In my 2017 I am looking for places to mount the main unit of a radio (6.5"x2.5"x10"), and running power directly from the battery. On my 02 GC there was a cubby hole under the drivers side rear passenger seat that you can pull on the pullstrap to lift the seat for access. Are there any places like that on the MK's? Also are there any easy to access places to run a pair of 12# wires up to the battery w/o punching holes in the firewall?