Its under the seat, along the left side of the battery. Follow the braided line to where it clips into the battery box and shine a flashlight around that area. Don't mistake the heated seat cable for OBD2, well, it won't connect anyhow.
FYI GuzziDiag is useless on the 7SM. Just basic info, nothing you didn't know alrerady. No Diagnostics, No service wrench resets... (Anybody know the service code for these bikes?) Functionality may improve in time but for now, its a waste of time.