Alternator wiring

Thanks for your input guys,have learned a lot these past weeks.Cleaned all connections,still getting 15.2 at fast idle.Have ordered new VR incase my one is playing up.
Have done the Mad electrical conversion ,i have a new 60A alt new 6awg cable goes direct to starter relay pos post through fused connection.From starter relay post a 1awg cable goes through car to rear trunk mounted battery.Grounds at batt and 2 from engine to chassis.alt wires as follows Green field wire to fld side of reg.no 2 field connection grounded to alt case.
As i have clear path to battery how does the VR regulate voltage to batt.
Probably a dumb question but its niggling me.
And a Happy New Year to you all!!