I recently got a LeddarTech Leddar One rangefinder, which has a UART serial connector. I'm used to boards denoting the pinout directly next to the pins, but the only distinguishing mark on this board's serial connector is a small triangle pointed at the last pin (or the first pin, if you turn the board around.) Does this triangle mean the ground pin? I don't know a lot about PCB markings, and there isn't very much documentation on this product.
As you probably can figure, I don't quite want to find out firsthand what happens if I plug the cable in the wrong way.
Any help would be very much appreciated.