1 12129121 - 4-Way Electrical Center Base

Module 1&2
 2 12077571 - 6 Micro-Relay (ISO) Module
  4 12077572 - Secondary Lock
  4 12077530 - Latch
  2 12160897 - Cover

Module 3&4
  2 12xxxxxx - 6 or 8 MaxiFuse Module