If your bike is the earlier ext fuelpump model then it connects to the same positive wire as the injectors connect to (in the same harness), otherwise it connects into the plug that goes to the fueltank sender unit on the later internal pump models.
I think this is what you wanted to know?
Leonard.
BTW I'd use a relay to connect the pump with its own positive wire to the battery and the original wire to power the relay. Especially if it's a pretty big pump.(less current draw from the injectors).
I think this is what you wanted to know?
Leonard.

BTW I'd use a relay to connect the pump with its own positive wire to the battery and the original wire to power the relay. Especially if it's a pretty big pump.(less current draw from the injectors).