'69 L78 Camaro negative battery cable hookup

[3macs1]

My correct 69 alt. bracket has 2 holes, about 1" apart. One is for the heater hose bracket, and the other is for?

I have checked what I have left and remember what I have sold just lately in 69/70 top BBC brackets. The second hole in the 69 was for a plastic clip in the alt harness.
None of the 69 upper brackets showed any indication of a battery cable being bolted to them. The 70's however some showed the outline of the battery cable star washer and some didnot. I cannot seem to get a date however when the revision came into place. I know a august 69 cast 454 didnot have the cable on the bracket but a jan 70 cast 402 did. Not sure if this helps or not.