Gen 1 Hub-motor Install
Following will be a few pictures of how to install the hub motors. However, I used Paris trucks, same process for other trucks.
First find where you want the cables to land and mark where the grub screws land.
Next you will drill two wholes for the grub screws to fit into. I used a 9/64 drill bit.
Drill a little first and make sure the screws are going into the truck and the alignment is good.
If everything is looks like it's going into the truck keep drilling deeper until the motor is flush with the truck. should take about 5-10 minutes the whole process.
Hope this helps.