That thing is a ROYAL PITA to mount. It would be a breeze if they gave you the female part. I had to make one and it sucked. The tits have a goofy shape and profiles. That has to have a female mount base made for it, it's out there somewhere but I couldn't find which one. Every thing else was AOK with me though I'm guessing that is a rear fuse panel of of some late model production vehicle. They have a mount base somewhat like this in the truck. The boxes clip in and out and that would make that thing flat out awesome.