The A25 has standard 3/4" spaced dual binding posts that will accept wire or banana plugs. I would get dual banana plugs which are a standard 3/4" spaced and this will prevent a + banana plug from touching a - banana plug and damaging the amp.
The crappy chinese dual banana plugs will peel and if you use them with wire the screw is not threaded to the end and will not engage if you don't use small enough wire.
I would get a pair of Pomona dual banana plugs. They are the quality stuff.
To use them, identify the side of the wire you want to be the black, negative, terminal on the amp and speaker. Unscrew the grub screw in the banana plug, insert the wire and tighten the screw to secure the wire. Don't tin the wire except on the very end as under pressure the solder will flow and cause the set screw to become loose as the solder squishes under it.
Repeat the connection for the positive, red side of the wire. Hook them to the amp and plug em into the speakers and you good to go. Most dual banana plugs have a tab and label it gnd. This helps you keep the polarity of the system correct, doing both speakers the same.