Wiring upgrades and ammeter operation

I was hoping that the 10ga wiring that is hooked to the ammeter would still allow the guage to operate even though i add an additional 6ga wire directly from the alt. to starter relay..... i was just curious if someone did something similar...

Partial load on the amp guage wire will only show partial charge or discharge.
So even thought it won't hurt anything, it won't be anywhere near accurate.