APC Netbotz Rackbotz: Anybody know the pinouts for the sensor cables?

My unit is a Rackbotz 400E. These are the round mini-din sensor ports on the back.

Somehow APC deems the pinout to be a closely guarded secret, somehow related to the fact that they charge $50 for a mini-din cable that ends in two bare wires.

They charge $100 if that cable has little 50-cent switch at the end.

I know I can take the unit apart and look at the circuitry, but if somebody has already done this, I’m ‘all ears’.