"Wax on - wax off Daniel san"
I must say the pics are an education to me, never seen anything like it!
Sure looks like a knockout, perhaps tap one side down so the other side kicks up, then pull out with pliers/vice grips
I think they're just a plug, not physically attached around the periphery, so could make them rotate, then easy to pull out with no drilling debris.
They surely must come out?? They surely don't expect you to tediously fill it through those little holes - nobody lives that long!!
So maybe there's no need to remove the wax, just pull the whole thing out. I think the wax covered hole simply acts as a 'relief valve'
Edit: Or perhaps screw a self tapper into the hole and pull on that??