Our break-in assembly holds the Losi NASCAR stock 380 size motor in a clam shell fixture that slides in and out of the water tank. The assembly features a CR123A 3V battery holder, M22759/32 mil-spec Tefzel wire, and gold plated 3.5mm female bullet connectors to easily connect the Losi motor. The clam shell fixture also features stainless steel hardware. Operation is simple. Install the motor in the clam shell, slide the clam shell fixture with the motor into the water tank, and plug the motor into the battery power supply.