I found no better place to put this on the forum, alright!

First, how the hell do you go about afixing 2 sheets of Polycarbonate together?

Secondly, I have a pic of my drive on my profile any idea how to mount the fixed axle to polycarbonate? Should I cut a hole the same size as the axle and slide it through the polycarb panels or cut the axle and affix it with screws/bolts?

Suggestions welcome.