Lets see.....brake lights, defroster, hatch release.....am I forgetting something? 3 sets of wires.
The bumpers are those little screw-in hexagon looking rubber things.....I run without them. Not a big deal. They go on the underside of the hatch opposite little round indentations right behind the taillights. There are two more inserts about halfway up the hatch inner lip...little triangles of rubber.