I can't figure out the new boltless Liberty frame. I upgraded my guts from a 49" Liberty LC to a 54" bare frame Wecan bar, keeping my old guts, harnesses, lights, I/O board, etc. But I can't figure out how the new frame closes up. I tried to slide the top frame on the top of the lights, without luck. How does the boltless Liberty open and close? I looked for Youtube videos without luck, they all just show the lenses coming off and modules popping in or out, which is easy. Can someone explain in some detail or point me to a video? Thank you!