The plug fits on to any port with the 6 pin slot connection on the PCB. Overlay included. Balboa 2.0KW Heater M7 (For new GS100). Balboa 2.0KW M7 Heater with Studs (GS-GL). Balboa 2.0KW Heater M7. Balboa 2.0KW Heater with Pressure Switch.