For Westinghouse units such as WD-3 Case Junior, WD-5, WE-6, WD-6 Case Master, WD-10 Case Giant, WE-10, WD-12, WD-20, WD-22, WC-42T, WC-44, BV-56, WC-96, DU144, WC-160, BV-240, DU-144, Selectivends, some V-83 and any Vendo unit with a Westinghouse Compressor System.

This is  for the BACK of the chassis or deck plate that do not have springs.