We put the thick mixture around the bolt hole, and using a 6mm bolt as the guide, drop it on in. We use a metal bolt here that will easily break free of any stray epoxy that that got into the threads.
Let the epoxy form a nice fillet. I will go back tomorrow with epoxy and fillet any washers that do not have a nice fillet already. The 24 hour epoxy really soaks in, so sometimes the beautiful fillet such as is this photo disappears overnight.