Ground wire location for 71' Demon turn signal /park lamps

I had to replace the pigtail connectors for both front turn signals on my 71 Demon.
Both of the separate ground wires were missing on the old ones.
I'm not seeing where the ground wire with the eyelet grounds to for the new connectors.

I just did not want to drill a hole and screw it into somewhere it should not be as I'm trying to keep it looking factory.

Looking to see where it screws to please and thank you!