I was able to see if the epoxy stopped the leak by plugging the inlets with wine corks and submerging it in my sing.
If the leak still exists, you may have to do the following.
Remove the end cap on the radiator by bending back the tabs holding the plastic end. The end cap will come off. You will need to idenify which port the hole is in. Lucky me it was right on the end of one of the ports. Otherwise I would have to plug multiple ones.
Drain it, and spray the areas with brake cleaner. mix the epoxy and push the epoxy in the port of the one with the leak. Let it dry overnight.
If your hole is in the middle of the port you will need to plug both ends.
Test it in the sink.
This is about a 2 hour job.