3rd brake light wiring on a leer camper top with hard wired interior roof lights

picked up a camper top today and need help on where to splice/plug into so my third brake light and my camper top interior lights work. any help and advice is greatly greatly appreciated. wiring from the camper top looks as such in the picture. two outside wires are solid red and two inside wires are solid black with red stripe

 

I would suggest wiring the interior lights to the running lamp circuit as long as it doesn't pull too many amps.

Third brake light on the tacos is a breeze, just wire into one of the tail brake lamps. No worries about the topper brake light flashing when turn signals are on, since we have amber lights for that!

Installed a topper on an F-250 once, and had to find the third brake circuit hiding down by the trailer hitch. Major pain...

I would also see about disabling the stock third brake light since it's kinda pointless...

 

Also, one way of splicing on without cutting wires is to use some of these. A little cheesy, yes; but they do the job.

http://www.traintekllc.com/Suitcase...or-18-22-Gauge-50pcs/productinfo/TTK-TAP1850/

 

think it would work if i cut the plug and spliced the brake lights and int. lights together and then spliced into the brake lights?

 

You could do that, as long as you're talking about the running (dim brake) lights.