I agree with many who suggested good Rat Shack, Home Depot or other 12-14 gauge wire. Also, twist and solder the end makes for a good "pin" to stick into the side your binding post, but test it for size before soldering because it will be difficult to "re-size" after soldering.
I kinda disagree about spades over banana plugs. The Nordost Z-plug or similar BFA type banana have a very large contact area and they fit very firmly into place. And unlike Spades, they don't require periodic tightening of the binding post. They actually put outward pressure on the internal surface area of the binder and likely prevent movement of the nut. With spades, every time the cable is tightened/moved, it has the potential to "stick" to the nut and cause it to move. This can eventually cause loosening of the connection.
I love Z-plugs! If you haven't tried them, give them a look.
Enjoy,
TIC
I kinda disagree about spades over banana plugs. The Nordost Z-plug or similar BFA type banana have a very large contact area and they fit very firmly into place. And unlike Spades, they don't require periodic tightening of the binding post. They actually put outward pressure on the internal surface area of the binder and likely prevent movement of the nut. With spades, every time the cable is tightened/moved, it has the potential to "stick" to the nut and cause it to move. This can eventually cause loosening of the connection.
I love Z-plugs! If you haven't tried them, give them a look.
Enjoy,
TIC