Since the clock will be on the wall, put the 200 Ampere hour batteries on the floor, and bring wires down to it.
Better yet, wire the clock to an AC/DC adapter plugged into the wall socket.
Since the clock will be on the wall, put the 200 Ampere hour batteries on the floor, and bring wires down to it.
Better yet, wire the clock to an AC/DC adapter plugged into the wall socket.