Syncro 4&4 Discussion and Q&A last answered over 2 years ago.
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bottom one looks like the fuel line from the bottom of the tank with a reduced t for an ebber. measure the larger pipe if it is 11mm internal bore if so then thats what it is.
Parts came in a box with the Doka . PO had also owned petrol SA microbus syncro and ex- CJ' 16" sika syncro. I think he picked up a few random bits when CJ 'retired'. These are some. I think PO had a late bay tucked away but I didn't see a T4 .