Trouble sourcing oil leak

I believe its 1/4 inch npt. I would screw a close nipple and a tee in there and use one side of the tee for a mechanical gauge to show pressure in pounds and install a sender for the light in the other. The wire for that looks like a flat female butt connector on the end. If you cant find it post year of car and i can look up the color for you.and like others have said its a parts store item.