Power Management Module (PMM): Enclosure containing the charge controller and power switcher. Short battery harness: Connects battery to multiple battery harness or other load cable. Short 5-pin/3 battery: Connects primary and rechargeable batteries to PMM. Battery harness connects 2: Connects 2 rechargeable batteries together. Battery harness connects 10: Connects 10 primary battery packs together. Battery harness connects 8: Connects 8 rechargeable batteries together.
