There are a few steps to refitting a rear hub. Once you have the shim in place, you fit the hub, then a wavy washer and your hub nut. It starts to get a little tricky here. The hub nut has to be torqued to between 110-120 lbs-ft on this bike and of course as you’re tightening it the hub wants to turn.
You can see in the photo below that Corey has built himself a tool to hold the hub still. It started out as standard lambretta wheel. This one had seen better days and was never going to be used on a bike again. Corey took the rim and welded a bar to it. When this wheel is put on the hub, the metal bar hits the case and prevents the hub from spinning.
With this tool, the rest is easy. Torque the nut to 110, then put the locking plate on. If you’re lucky the locking plate will line up and you’ll be able to screw it on. Most likely you’ll have to tighten the hub nut a little bit more to line up the locking plate.
It’s good to have friends with tools!