Speaker Cable directionality: reversable??

Oleander: Just turn your wires around and don't worry about the arrows. It won't make a whit of difference. (It can't: The signal flows in both directions.)

Oleander .. sorry for the misunderstanding ... you can get banana-spade adaptors, as other posters said.
You seem to have replied without reading my post .. if you hook them up the wrong way around won't you always be a bit curious as to whether it would sound better the "correct" way ? Won't you end up switching them around eventually, just to see(hear)? I think you will since you started this thread, so it shows that you're concerned about it, and I doubt advice on this thread will completely put your mind to ease.
So my advise was to put them the right way around now, whatever it takes, or else it will just play on your mind that "perhaps the sound could be better".

I don't think it will make any difference, but does my opinion really convince you to the point where you don't need to try it for yourself ?

Twl .. phasing of speakers is done so that the cones don't move in opposition, causing cancellation. How can wire possibly have a similar effect ?
Bob .. your answer is interesting, but I have yet to hear any difference for myself, so perhaps, even though the crystal structure of the wire might not be completely even due to the drawing process it's probably a third or fourth order effect (after inductance, capacitance, resistance etc etc) and so not really worth worrying about.

Power does not travel bidirectionally; it flows from the source (the amp) to the load (speaker). Voltage & current parameters, while in fact altentating, are not in question here - it is the delivery of POWER from one place to another. Same thing happens within AC power lines; the power flows from the generator to the load (admittedly with some small amount of reflections which are academic to this discussion).
I correctly predicted that some naysayers would even argue with the manufacturer/designer; I suppose y'all know more about their products than even they do? Fine - I am not here for that. I do not have to prove anything to anyone; I've heard the effects with my own ears & verified by the designers that's good enough for me. Don't believe it, if you don't want the optimum from your rig, then you don't & you won't get that. But don't come up here disseminating misinformation to someone who wants to know the truth & obscure it with your misinformed opinions. I am only here to help Oleander get a truthful answer to his question & to get the most from his rig. If you don't want that for yourselves then I don't care, but he does. Good day to you all.

Bob .. I think you'll find that most "naysayers" would like a good explanation. I'm a naysayer because

1) I was not able to hear a difference with "directional cables". None whatsoever. I do believe that cables themselves make a big difference, so don't immediately brand me a luddite.
2) Nobody has given me a good explanation. Rather the believers are as much to blame as the naysayers for making this a "religious" argument based on faith in their own listening abilities, and half explained pseudo-science.
3) The cable industry is so full of (dis)information because there's tons of money to be made from gullible people.

I find your argument about power totally unpersuasive. Sure power is dissipated in the speakers ... so what .. how does that make a piece of wire directional ? Give me a good explanation (or an HTTP) and I'll stop disagreeing on this issue.