On the 10SI as shown in your first photo, the top lug should be threaded, while the bottom lug is thicker with a larger non threaded hole through it.
Looking at your first picture, the alternator is clocked in a 12:00 position putting the regulator connections in line with the top threaded hole.
Having one clocked at the 6:00 position would put the regulator connections next to the thicker non threaded lug. This could cause some problems on making up a connection due to the long bolt that has to go through both the alternator body (lug) as well as the mounting pad or bracket the bolt has to pass through also.
A 3:00 position would put the regulator connection coming out towards the engine block. Not usually a problem unless the alternator is close to the block causing the wires to rub.
I usually install a 10SI with a 9:00 position or the 12:00 like you already have. Yours is a one wire, but the regulator connections are still there.
Last edited by Roy Rodgers; 04/26/2013 12:17 AM.
