Thanks Ken, actually I have already bought the 56029431AH controller (but thank you) which is how I have discovered that I only have one connector.
I have now bought the T-Tap connectors and have located the bundle of wires that you show in your picture. BUT I notice that there are a few different white wires with green and blue stripes with varying shades of green and blue. How did you know which ones to use? Did you discover some way of determining which ones were the correct ones? I have connected the 'B' connector B3 terminal and I get power to the controller now but all I get is a CF error which I am understanding is because the B1 and B2 aren't connected. Thanks again for all of your help on this matter.