The camera I bought is about 1/2 inch wide - that includes four LEDs that light the area. You can capture the pics on the computer to enhance and interpret them (not easy!).
There MUST BE some sort of framing behind the cap - steel, I hope. You might also try shimming between the ends of the dash and the side walls. Whatever stops the dash from moving. I'd be concerned about electrical connections shaking loose - just something to check while you're loking in there.
I've seen several Tiffins after front end crashes - there's plenty of "metal cage" behind those caps.