I figured an amp that had visible fuses on it didn't needed to be fused additionally.

You must protect each part of a cable, the fuse on the amp is for protecting the amp itself.

With your setup it is possible to start an electrical fire: cable touches amp near wood, not enough current for the 250A fuse to blow, but enough to melt the small cable and generate a lot of heat. Not fun.

Got it, i will fuse em today.

Yes. You fuse the wire to protect the car, not the amp.

forgot this pic... thought id add it lol

 

all of your batteries are Agm correct?
 

yes, one deka 31 in the front, one in the back