Can someone tell me what this wire set is for or goes to? That will give me a place to start research how to connect them up. Thanks

Looks like fuel sender connections.

Edited February 8, 20223 yr by siteunseen

Yellow with the cap - Fuel sending unit signal.

Black with the cap - Fuel sending unit ground. 

It's easy to tell which is which.

The other two wires are for an electric fuel pump (unused.

thanks. It appears both caps are unusable they wont fit and stay in place. Thus i guess they came off. I can replace those easy enough. 

I have the tank virtually empty, maybe 1/4 gallon or less in it. Is this an item recommended to replace when you are refreshing a datsun 

or move of a leave it alone unless its broke?

The caps only hold on the wires to a limited extent. If the connectors are bent, they won't hold well, either. I think Eastern Beaver had the caps. Maybe someone can recall them being sold by a business in the USA.

If the vent hoses are rotting and you try to fill the tank, it will start spewing like a frat boy on his 25th beer. Do your research. Most of the vent hoses are NLA. You'll need to find fuel compatible hoses of the correct size. Do NOT use heater hose for the vent lines. You can get an idea of the routing of the vent lines from the FSM.

Not stock, but I think the size is right if you need new boots for the sender: https://www.amazon.com/Fastronix-Small-Terminal-Covers-Black/dp/B01LM2BW6A

I used these on my 240. Then covered with liquid electrical tape. Turned out good, water proof too.

Slides on the "nail head" terminals.

Edited February 8, 20223 yr by siteunseen

https://www.240zrubberparts.com/apps/webstore/products/show/5644516

33 minutes ago, siteunseen said:

https://www.240zrubberparts.com/apps/webstore/products/show/5644516

I knew there was someone stateside selling them.