The camera uses 4 pins in total: Rx, Tx, 5V+, and ground. You must supply your own 5V power (potentially from one of the pins on the board), and then use one of the two UARTs on the mangOH. I believe one of them is on the Raspberry Pi connector, and the other is on the slotted connector (I believe we used the slotted connector when we still used mangOH red boards but both should work). Best to consult with the mangOH Red manual for the exact pinout.
I don’t have a schematic handy since we use custom boards instead of the mangOH red these days but hopefully thats enough detail to get you started.