i keep blowin speakers,been threw a few pairs already so i bought a biketronics line leviler to go with the rockfoed fosgate t400 on a 2015 sg .
how do i hook up rca cables to the amp. does anyone have pics of how to wire the harness up to use rca cables

 

The RCAs go from LL output to amp inputs. The LL plugs plug into factory speaker plugs.

 

Yep what he said, and there are some great vids on the BT355 on YouTube to get a pretty good education on how to install and use them.
Kris

 

The amp should of came with a wire harness for high level and a wire harness for rca inputs. You just need to swap the harnesses.