After some consideration, I decided to put inspection holes into the fuselage bottom. Thus the AN5 bolts in the carrythroughs may be accessed from outside. Just in case I need to remove also the cross section (“X”) of the landing gear.
Hole size is 2 1/4 “. The enlarged hole in the carrythrough is allowing to fasten the nut inside. I will put a doubler from outside to ensure structural integrity.