Solved it. Daylight when I picked it up. It's the clutch bleeder screw

Hello I'm new to 4Runner. I've had 3.4Lt Tacoma, currently have a Gen1 Tundra up in the states, but first 4Runner for me and it's down here in Central America.

I'm currently in Central America and the location I'm in, parts are hard to come by.

I just purchased a 1995 SR5 4x4 manual 3.0Lt and hope to drive the 6hr round trip to pick it up this evening. When I looked at it, under the block right lower side I saw what looked like an port or flow nipple sticking out.
Basically looked like a trans cooling hose bib that's located on a radiator. But this just sticks out of the block and it was dry before we ran the rig. I forgot to look under again, but it was dark and raining.

Anyone have any idea what the nipple goes to, or where a hose from it would run? Thanks

Figured it out. Today I had better daylight and no rain so I could see it's just the clutch bleeder valve. All good.