Trunk Ground Location 1971 DART?

Good afternoon,

I am trying to identify where the ground location is for the trunk, for my rear lights etc. I followed the wiring diagram, but it simply shows a ground for the rear defrost motor. I don't believe I have rear defrost and if I do, it does not work, as none of my HVAC works.

Can anyone send me a photo of tGround In Trunk.JPG heir trunk, showing the default ground wire connection?