That would be tricky and would depend on the car. If it's an E46 then they are behind the rear bumper skin. On my X3, they are built into the rear quarterlight glass. Dunno about the 5 series or the X5.

What car have you?

I don't know what you are expecting out of the TV module - I found analogue TV was pretty poor whenever I wanted to use it, and a total waste of time with TV-in-Motion. DTT (Freeview) is better stationary but depends on whether there is current coverage, but again useless whilst moving. I have a Hybrid VM by the way

Will be interesting to see whether it significantly improves when we go fully digital in the next couple of years - assuming of course that the BMW Hybrid will cope with 8k mode