Heater Cartridge Extension Cable - R1+
Frequently bought together:
Robo R1/R1+ Compatible Heater Cartridge Extension Cable
PBX brand extension cable for R1/R1+ heater cartridge
This cable has a plug on one end to plug into the R1/R1+ heater cartridge wire and bare wires (no plug) at the other end, so you will need your own connector.