Hope you can attach it, is tricky with different thread sizes SAE/english stuff and DIN, self sealing or not etc.
I added a classical "mechanical" Instrument via a T bridge at the sending unit location. Was a bit effort to find a braz bridge and adapters so that both are working in parallel electrical and plain "mechanical". Other forum fellows have done this as well. There are def some pictures as far I can remember. I was eager to have something NOT looking like a cristmas tree
Car is in winter sleep but if you need a picture happy to provide.
Matthias