Binding Posts Too Small For Spades What Now?

Hi and Thanks for any help you can provide.

I just picked up an old yamaha m45 amp for my second system. it sounds fine, but the binding posts are too small for my speaker cabels. What is the best option? Are there terminiation adaptors? What's the best configuration and brand? if it helps, I'd rather not go 'bare wire'.

thanks for any help,

david