terminals

This seems like a no brainer to me but I was curious if there were any drawbacks: I have a JL Audio XD700/5 amp that accepts speaker wire without any terminals on it (aka bare ends). Should I solder the bare ends of the speaker wire that will eventually be placed in their respective terminals...

So I've got two old yet nice and supposedly still functional amps that I rescued from a friends garage that I'd like to good use (MB Quart RAA2400 & RA4200). The amps use a really nice proprietary plug to connect the speaker, remote & power wires to the amps. Unfortunately the amps I have...