spycatcher2k - thanks for taking the time to send me the link to a possible manual. This is something I was aware of but unfortunately it doesn't provide the information I'm looking for.
You're right of course that this isn't the Sainsmart support forum but the self-balancing robot kit I have is based on the Arduino Uno and so I was hoping one of the arduino forum followers might recognise it.
I have tried Sainsmart support but they're sending me around in circles, so I thought I would try a different avenue...
For anyone who may be interested, this is the kit:
Despite what Sainsmart say it doesn't come with full instructions and the instructional video link they do provide describes the non-lcd version of the controller, not the lcd version that I have. The specific interconnection information I need for the controller is that between the lcd module and the mpu6050 board.
Thanks again, and thanks also to anyone else taking the time to read this.