Usually the headlight, display, throttle, and ebrake sensor connect to that plug. It’s a 9 pin plug there, then breaks out to the other connections. Do you need an extension cable, or something?
Will you please share a photo of the plug? The original photo vanished. Please include the “face” of the plug so we can see all the pins and their arrangement.
I’m pretty certain one of these is what you are looking for.