Most likely an aftermarket backup camera.

Something like this: https://www.amazon.com/dp/B09895SXYG?ref_=cm_sw_r_apan_dp_JHVSHB4W8DVS5YK4AR65

EDIT: Technical27 is right, that plug is for the sun sensor of the automatic climate control. These are worth about 70$ new. I still think the marks on the top of the dashboard are from an aftermarket backup camera, or aftermarket GPS maybe...