I'd be careful when using wrenches, besides scuffing the posts and possibly devaluing the resale value, you might strip the posts. A tight connection is absolutely needed, hand tightening usually works. I have an old plastic "Postmaster" specifically made for this, but I understand they changed the design some years ago, and added a metal insert, which made it more likely to cause similar damage as a wrench might. I don't know if either version is still available. You can use a wrench, but do so with caution.
Dumb questions?
I have an Oddysey amp and Nestorovic speakers. The speakers have a 5-way binding post and the amp doesn't. I want to use the holes drilled into the post of both to connect new speaker cables. The hole in the amp post is about twice as large as the hole on the speaker post. I think about an 1/8" diameter for the speaker, close to 1/4" hole for the amp.(I'm not home right now) First, do I have to use a pin connector or can you put banana plugs in these holes? The hole for the speakers are too small to put bare wire through. Right now I'm using spades but I have to put one fork of the spade through the hole in the amp post because the diameter is too big to fit the whole spade around. Second, would the dealer I buy new cables from put these connectors on the cable for me as I don't know how? 3rd, any opinion on what type of connector gives the best signal transfer? (I find it difficult to tighten down spades enough) Thanks.