take the bin out.
On the left hand side you will see a slot for a screwdriver. Put your flat head in and push down and pull forward. Now you have access to the wiring harness. Unplug the harness.
Now that tab you have been messing with side your flat head behind it so it's unlocked from the ice room.
Pull, the ice maker, auger and fan will come out in one piece.
You however can still do the standard test. valve test and forced harvest if you remove the power head cover on the ice maker.
Tech sheet attached.