The lamp driver PCBs do not have to be removed, but all wires need to be disconnected. Each board has:

A 2-pin low voltage connector from the power supply

A small 3-pin connector, on the vertical daughter board

A 2-pin white connector, carrying high voltage into the lamps.

I suggest tucking the white lamp connector back inside the lamp house to keep it out of the way.

If removing the PCB, each one is held by 4x T10 screws.

The front driver PCB has a plastic insulator on one of its mounting screw posts. Be careful to not lose it!