Ammeter to Voltmeter...who does it?

I will be doing all the same mods on my sons 69 notchback. The only change I made in my wiring in the last schematic pic is I still ran the wires through the bulkhead connector since the whole output load of the alternator isnt going through there anymore, and is essentially split through 2 feed wires to the dash. I even have the sun volt gage at the ready for when the time comes to redo his dash.