Hey guys, I'm wondering if someone on here could shed some light on some cooling system routing for a 250SE? I had some replacement coolant pipes fabricated for my 250SE that has been sitting for years. It has been awhile since the cooling system was disassembled and I don't remember all of the details about what goes where.

There is a hard cooling pipe that routes around the front of the oil pan and goes over to what looks like an expansion tank on the driver side of the engine bay. There is a nipple on the top of it. Can anyone tell me what attaches to that point?

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1968 250SE