DLM
Yes, very similar question.
Very similar answer - The Esc has:
one control lead - 3 little wires with plug for Receiver
Two battery wires - always red and black - often with battery connector
Three motor wires - in your case black
Connect
any of the three wires from the ESC to
any of the motor wires
Try the direction of the motor
If you don't like it unplug any 2 of the 3 wires and reverse them
motor now runs the right direction
If you prefer not to take the 50/50 chance when you connect it up each time you could mark the ESC wires with coloured tape, or maybe little bits of heatshrink so it always goes together the right way.
Hope this helps
The WONDERFUL feature of these questions is that lots of people are diving in with BL systems and there should be a lot on the water before long!
Please DLM and dan - show us yours
andrew