Retractable landing gear

I am building my first Drone a Tarot 650 sport quadcopter. Can anyone tell me about the retractable undercarriage power controller which comes with the airframe and where to connect the red and black power wires. The 40 Amp ESCs have no BECs, Should the power controller be connected to the PDB! I think that the power controller might be 12Volt! check this series of vids out