Apologies RichardV6…electronics are not my forte…what are A1 or B2+ on a dynamo or alternator? I assume the hot, non ground, terminal? Are they labeled? Many thanks

1965 Plus 4
2008 997 Turbo Cab
1981 Alfa Spider
1954 Austin Healey 100 (SOLD)
2013 M3W (SOLD)