Whether or not the actual mounting location decision has been finalized or not the manner in which you've routed your wires behind your dash that way has extremely limited your potential options.
From what can be gathered from the pictures you've posted the available options you have left yourself are, bar none, less than optimal for proper imaging.
Like I said in my first post in this thread...I'm not understanding why someone would go through all the trouble that you obviously did for no purpose other than to screw something up.
The above ^^^ has nothing to do with immaturity, fella. It has everything to do with apparently knowing more than you about the proper implementation of separate drivers and the effect said implementation has on overall system sound.
You went through heaps of hassle just to screw yourself, in essence. to most people, myself included, this is more than a bit nonsensical.