Thank you to the both of you! and the video was a great help. I have looked at the schematic many times and never noticed "#30 Lock nut"
I was looking for a threaded flange or large washer that the bolts would thread into.
Just wanted to add, don't overtighten the bolts. Just tight enough to remove the up and down play in the box. the relay box should still turn freely on the tilt assembly.