Like others, I've got a dual battery opposite from my primary (in the side with the brake lines). I also have a compressor (a single, think it's a TJM based off color-it's been a bit since I grabbed it in Abu Dhabi). As the pictures note I managed to also squeeze my NOCO into the space. Winch solenoid is buried in the winch bumper with the plug wired bulkhead mounted there. Annoying washer bottle is in the stock location, as I didn't want to fiddle with that-yet (that time may come, to fix the asymmetry of my bumper).
My point; with limited space I think folks have to prioritize what needs to go where.
-Dual battery setups, unless you are running small aux batteries, tend to lend to using the opposite side space. Excellent kits like the traxide and the fact that stock factory tie down components all reinforce that.
-Underhood compressors pretty logically fit forward of the aux battery in that space.
-Winch solenoids could, with a little fab, be remoted there (i.e. where my NOCO is since that is n/a in my application).
*Any disconnect switch really should be tucked away but outside; what's the point of a disconnect if you have to pop the bonnet open to use it?
Just my $.02 regarding prioritization and the attributes of the truck's as they exist.
r-
Ray