While installing my Mach 1 grill delete, I was attaching the last two plastic fittings that hold the top of the bumper cover on (these also hold the bottom part of the grill delete kit on). I noticed when the fittings were out, the bumper cover moves up and down an awful lot! It doesn't seem there's much support for the bumper when only those two small plastic fittings hold the cover on at the top! Am I missing something here? Where else is the cover supported or held on? Thanks!!