The memory addressing and read/write operations work after having finished the wiring.
You can select a 5-bit address by clocking +24V or GND to the 5 address relays to set or reset them.
The memory multiplexer selects the one of the 32 cells and puts its state to the ALU-Multiplexer which can store the bit into the ALU a,b,c cells.
A +24/GND clock on the write wire will write 1/0 to the cell.

Video will come.