looked at the pics, very close up !!!. Is there a “F” terminal on the back of the alternator or is it a permanent magnet type. If it has a F terminal then just run power to it and with the motor running and it should put out maximum amps and volts. Alternatively you can bridge out the 2 teminals on the regulator and have the same effect ……….hope this helps
We eventually concluded that one or more diodes in the regulator were faulty, and went hunting through the local tip on the offchance we’d find a regulator for a mid-70’s French light car. We didn’t, of course, but what we did find was a Lada Niva which appeared to have been thrown out of a helicopter and then buried in the mud for a couple of decades. We attacked the welded-together mass of what appeared to have once been the alternator to discover to our delight six perfect diodes which fitted the aircraft.
At the current attrition rate I have sufficient spare diodes to last another 150 years.