how do you lock the rear

[CorbettTrailers]

I'm a little late. but I locked mine with Freddy's method. I drilled and tapped a hole. It still requires complete disassemble of the axle hosing and differential, but I've had no problems. And this includes hauling the neighbor kids around on my trailers and running in grass. Freddy would prolly be able to tell more. I locked mine right before the Brookville meet in March and I'd have to tear mine apart to remember how to do it. Too many knocks on the Noggin', even with a helmet it still had an effect.
But glad you got it locked!