TR6060 swap - missing Reverse light switch

[EVantage]

We swapped a 2018 Camaro ZL1 TR6060 into my 1969 C10 big block pickup. The trans is shifting just fine and is sending speed info to my Dakota Digital RTX instrument cluster. We replaces the rear/remote Camaro ****er with an SST center mount shifter. We did not wire up the CAGS or Reverse Lockout Solenoid. On the passenger side of the transmission, there was no reverse backup light switch in the lower center hole. That hole is not threaded like earlier transmissions. Is there a different location for the reverse light switch, or a way to activate the backup lights from the transmission?