I have a x930 in my yukon denali. I want to take it out and replace with with an older f90 because i'm trading my car in want to bring my x930 with me into my new grand cherokee. Is the back harness different on these models or can i simply remove the x930 and swap in the f90? Also what will i need for the x930 to be installed into a 2012 Grand cherokee