GPZ 1100 B2 1982 Electrical problems

Hello dear community, I got an old GPZ 1100 B2 a few days ago. It was 32 years under a pergola. The engine can be turned after some try and fresh warm engine oil, the clutch separates also and the gears can be switched. It was probably totally resinous. Now to the problem: Plus pole cable to the starter relay and the fuse box is missing. From the starter relay a cable goes up to shortly before the battery compartment and ends with an eyelet. From there a cable to the + the battery goes with some exits from the plus pole to the fuse box. A branch is provided with a flat cable shoe for the fuse box. But from this cable shoe there is still a cable piece which is equipped with a diode. Someone knows the value of the diode or the cable. Maybe someone knows with electrics of the toll GPZ. I search schematics and rep. instructions to the Kawa as well as spare parts. And seriously, the one or other advice. I hang no ch two pictures of the cable tins on. Are probably for the Canada and US models, because the plug connections do not fit to my electrics. I thank you in advance and wish everyone a lot of health. Achim