There are two return ports. The staff answered with that and then didn't say which was which.
The port on the top, opposite the return solenoid, is pressure out. The red plugged port on the side just below the return solenoid is the other pressure out port.
The small hex plug below that is the auxiliary return port.
And the port just below that is the cavity for the pressure relief cartridge. (hexagonal, about an inch long)





