With the cleanout cover in place, it was time to fix the tank retention straps. Rather than using the original plumber's tape, I installed a couple 1" nylon cam straps. I cut the hooks off the end and then put a hole through the strap using a hot phillips screwdriver.
The straps ends were retained by 1/4" lag bolts and large area washers.
I installed a cleat on the outer side of the tank, and then installed the two retention straps close to where the original straps had been.