This control unit fitted GP1300R as ski damaged body repoted few days ago. Then I disconnected all wire harness and found problem.
Worst case water or moisture get through inside of coupler and damaged or corrode terminals. This may occur to won't engine start or lost power because this harness are all sensors line.
This pictures are other customers GP1300R as fitted RIVA EFI control unit. This couplers had no blind plugs too and damaged most terminals as ski runs bad.