I did remove the bolts that attach the pump to the container. As suspected the nuts then fell into the lubster. I removed the pump to find that there is only about a 2" dia. hole so no real accesses to the lockable fill unit. I may turn this into a display cabinet to display some of my Filpruf bottles, this would then give me the access needed. Luckly, I was just able to get my fingers through the 2" hole and reach the bolt mounting location to epoxy nuts to the inside of the container to reattach the pump.