Hey im looking at the same, (posted a few times) i cant find a way to secure it flush, how did you do yours?? i want it done so there is no bolt heads showing. All infor appreciated.
There are two m8? Threads at the top left and right to bolt into and then i teck screwed in a few spots along the top rail to sure it up. Nice and slick.
Sweet! Was pretty simple. I ysed 1.5mm sheet to reduce weight but have enough rigitidy when screwed down. All it needs to do is hold lights! Looks ok with no checker pattern too! I was over the bumper bumping my pannels and causing damage instead of preventing it! Also, dont forget to drill a whole for your spare tyre thing to fit through!
Go to a wrecker and get a rear panel off a DX. They don't have the rear bar on them. You could try a price from nissan to. I have one on mine because I have the ARB rear step tow bar fitted.
This is the only photo I have of it on me I can get more if you want any.