When I remodeled, I removed the partially recessed meter boxes that were near the center of the bays (who ever thought that was a good location?) and, installed the new boxes about three feet from the entrance ends.
My brick mason then added a course of “jumbo brick” to each meter wall, basically thickening the entrance end of the walls. This made the boxes flush-mounted and allowed for the installation of
coin safes on the end caps. Yea!!!, no more soaking wet
coins or water damaged acceptors and timers. They look less like an afterthought and the chances of vandalism/theft is greatly reduced.
A few years later, I visited a new facility and wished I’d thought of his installation. His back-to-back meters fed
coin safes, too. But, the thickened end walls were built like full height columns turned 45 degrees…think diamond-shape on the end of the wall This placed the meters in the driest part of the bays and at an angle so the customers could see the display timers from anywhere in the bay. The safes were just like mine, accessed from outside the bay. But, he never got soaked by a customer when he collected the money.