Questions about installing second backup camera on Leer shell

So, I'm sitting here brainstorming and I think it would be super cool to relocate my backup camera to the top of my Leer 100xr I just installed. The added height would be great for visibility. 2012 with JBL audio and nav

Ideas and questions I've got so far.

1) I'm thinking I'd get a second third brake light for my cap and try to modify it to house a backup camera in the middle since I can't seem to find one that already exists. Thoughts?

2) is there a away to wire up two backup cameras and have a switch in the cab to change between the two. That way I can take of the shell or use the lower one if, for example, it proves to be better for hooking up trailers.

3) should I just buy an external camera and mount it to the outside of the shell? How would I go about wiring that in? Would I be able to pull of my switch idea still?

 

so like, could i wire this kind of camera into my stock system on a switch?

https://www.crutchfield.com/p_110BCAM200/Jensen-BUCAM200J.html?tp=83

 

Take a look at this one.

https://camera-source.com/automotiv...a-tacoma-camper-camera-kit-plug-and-play.html