you may have a disc covering the NS foglamp (now brake) hole but it twists out easily and you need a bulb of course to go in it
once swapped and both brakes now working as planned tap into the fog +ve supply on the drivers side and run a single wire to the now empty space the other side to use the old brakes as a pair of fogs
I took mine out when i was welding the arches so you reminded me i need to put it back in now - doh
just don't sit at the lights with ya foot on the brake or you'll get gobbed at and shouted at 'ya fogs on'
