Lol!
Drill pilot holes, and countersink holes if it is meant to look good.
Use stainless steel coarse-thread deck screws, for appearance and to avoid problems in case it gets wet.
Before joining the pieces, seal with a SILICONE caulk. It is easier to disassemble/repair/modify the item later if it is SCREWED together rather than epoxied, and the silicone will prevent air leaks or water entry.