Onto the build!
I'm starting with the gear because I've never seen or used electric retracts or brakes before so I was very curious.
You start by attaching the 'brake disc' which is a circular piece of magnetic material which can then be affected by the electromagnet. These attach by removing the 3 screws you see in blue below and replacing them with longer ones included in the kit, these attach with locking washers but i have added blue loctite just as a belt and braces approach.
Once the wheel is assembled with the brake disc you then put it on the axle and attach with the brake unit itself onto the oleo.
After that you need to attach them to the retract units with the included pins and spacers.
Photos of the electron retracts: