I was considering mounting my new CB radio there.
I was going to mount it horizontally, with the speaker (on the bottom of the unit) facing out into the cab.
I just replaced my head unit and just had it all open,
so I was looking to see how far down I could stick the CB into the space under the drawer, behind the cup holders.
(I'd obviously have to cut out some of the plastic)

I removed mine and installed my sat radio in its spot. Wires run nicely through the pivot holes that were already there. It is also recessed enough that it doesn't interfere with drinks that are in the holder.