OK.. here's a shot of my radios. (They are kinda fuzzy...and my truck is kinda dirty... lol) Sorry it took a while... holiday season!
I have a Uniden Beartracker 7 Scanner under the steering wheel on the driver's side attached with one already there under dash screw, and then screwed in with another screw (I think it was a self tapper? lol) to make it two. The scanner is about the size of a small radio like a cobra or radiosmack), so this might be a good comparison:
I also have a Uniden PC78 Mounted in the same fashion on the passenger side under the dash. This one just used two of the original dash screws that were already there. Easy install.
Here's a shot of all three. The Icom 2720 (Amateur) has a removeable face that we attached to the front of the ashtray.
Hope maybe this helps....?
Heather