TCS European Harness MC-1"-21 ~ 7 Pin JST To 21 Pin Motherboard 1355
The MC-1"-21 is an adapter harness with 1" (2.54 cm) wires used for connecting a 7-Pin JST to a 21-Pin motherboard.
7-Pin JST decoders such as the MC2 and MC4 may be adapted to interface with NEM660 (21MTC) via this adapter harness.