On my '76 Wagoneer, for the rear drum brakes there is no slot in the brake backing plate to insert a brake adjusting tool and back off or adjust the brakes, just a depression in the metal where a slot is normally located. Did they forget to cut that out at the factory? I was able to get the drums off by pulling them by hand while jiggling them, but how do I adjust the brakes when I put them back? Would it work to just tighten them enough such that the drum barely slipped on, and then rely on the self-adjusting mechanism (if it has that? I'm not sure.....not sure what to look for).