For BMS Functions. Options:

Ampseal 8, for Standard BMS. View the Specifications here:

Lithionics Battery® Ampseal8 Harness Kit

Ampseal 23, for Advanced BMS. View the Specifications here:

Lithionics Battery® Ampseal23-5V-UART

Lithionics Battery® Ampseal23-Consumer

Lithionics Battery® Ampseal23-RS232-DB9