installing new sub and amp with stock head unit

Hi all, been searching forum for a couple hours and cant seem to find the info im looking for, so i decided to start a new thread.have 2010 taco,just purchased 10" sub/box and amp to replace stock. i am keeping stock radio. Here is my dilemma: i have pulled out old sub and amp. There are i believe 3 plugs that came off amp. which wires do i splice off of for rear speakers for line out converter for amp?also what do i do with rest of wires. second question is on remote wire for amp: do I have to run all the way to radio? i was assuming there was already a remote wire ran for the existing stock amp, and can connect to that. I appreciate any help. thanks

 

hey I just found your post, wondering if you can give me an update on your progress. I think what you need is the wiring diagram, do you have the JBL system installed.