Working on a '66 Metuchen GT fastback, scheduled date 19A, buck tag 24A. Noticed that there are 2 sets of holes in the rear floor pan under the rear seat where the parking brake cable brackets would attach from underneath. On each side, one pair of holes had screws in them, the others didn't. Just trying to confirm this is normal and if there was any caulking or sealer over the holes not used.