Pop out the C-clip in the rear of the machine, attaching the rail to the motor mount.

If your print bed is too far forward to access the front C-clip, you can freely twiddle the spiral rod to move the print bed further to the rear. It is automatically calibrated on every startup, so there is no harm in moving any motor manually.

Pop out the C-clip in the front of the machine on the opposite rail, attaching the rail to the chassis.

C-clips are hateful little things and love to fly. A great tool to have on hand is a magnetic, small-blade flat screwdriver, both for disassembly and reassembly. When disassembling, use another hand to cover any potential fly-off path the clip may take if it tries to escape Earth.

Once the C-clips are removed, simply slide each rail in the direction that was freed by the C-clip, and it should dislodge the opposite end, which allows you to pivot the rod and completely remove the rod.

Tilt the print bed mechanism on its side, revealing the ribbon connector to the main board.

To unlock the ribbon connector on the board, slide the locking tabs towards the back, parallel to the board, at the same time. They should move approximately 1-2mm, and the ribbon cable should then move freely within the socket, requiring no force to remove it, as it is a zero insertion force (ZIF) connection.