[Bsirker]

The silver gas cap separates into two pieces. You have to unscrew the two pieces and line ups the threaded piece with the black metal angled piece and pass it through the body and screw it to the body. I also used some black RVT between the layers to keep everything sealed. Also the orientation of the cap should be opposite to mine but I like this better because the lock side sharp; so I moved it to the inside. Hope this helps!