Object is a large plugboard, the front face is silk-screened with color dividing the holes into groups. Many wires are inserted, and also a number of special "T" and "Y" connectors to join plug-holes. Legends such as "MULTIPLIER" and "DUAL INTEGRATOR" suggest it is used with an analog computer.
Memory/connector / plugboard
Reeves Electronic Analog Computer (REAC); RAND; Programming