I am clueless on audio. I've tried to search for what I need but I'm not having success. I have 4 speakers mounted on my walls which terminate to a plate behind my tv that has 8 plugs. There are 8 monster jacks plugged into the plate, each wire has a bare stranded end that has been cut. My tv is an LG flat screen and it looks like the only output is optical. What would you recommend to connect the tv to these speakers? In the old days I had the speakers like this connected to a system where you screw the strands into a hole. Is there some kind of adapter kit that will let these go to the optical output? Do I need some kind of amp or sound bar?

Thanks in advance. Technology passed me by years ago.