Cadillac Repair: Adding 134-A, where, 2000 Deville, protective eyeware, pressure ports

Question
 Where to add 134-A to 2000 Deville?  Right on top are 2 high pressure ports, above accumu;ator on right fender in front.  Where is low pressure?

Answer
The low pressure side is the one closest to the firewall. As you will see there are 2 different style fittings that attach to the HI and LO service ports.

NOTICE: ALWAYS were protective clothing and protective eyeware when working with A/C systems.