RD1 pin of CCG2 is dedicated Rd resistor pin for CC1. Must be left open for cable applications and connected together with CC1 ball for UFP or DFP with dead battery applications. The reason we have this pin is because silicon design made a separate 5.1K resistance on this pin.
CCG3 have such pin, but it is already integrate inside of CC1 and CC2. You could went through CCG3 order information to get Termination Resistor, RD1 on CCG2 can be equal to RD_DB on CCG3 end.