help with stock jbl

i have an 06 tacoma dc, with the jbl setup, i ordered an amp and sub and hu(KENWOOD KDC-MP145) my plan was to build a box to put behind drivers side back rear and retain the stock jbl sub and amp on the passenger side. however the adapter to retain stock jbl setup uses 4 rca jacks, my new hu has 4 but i wanted to run 2 for my new amp, now i really dont care about the stock jbl crap just wanted the easiest way to make everything listed work? anyone have any wiring diagrams???
thanks in advance!

 

no one? can i just cut the male ends of the rca that come with this kit and splice to the harness on the hu i bought?
http://www.crutchfield.com/S-gYafxiMAa8o/p_142TA07SR/Scosche-Interface-for-Toyota-JBL-Systems.html