Technical Econometer diagram

[domtheboyo]

Morning All,

The Haynes manual isn't too helpful with this on my '88 Uno 1100 (Selecta). Pretty sure my Econometer has never worked so after digging around last night I spotted the hose coming out of the carb is just hanging lose. I assume the piece on the end should plug into a sender somewhere or another hose but I cannot see another hose with no connection or anything electrical near the brake reservoir it would connect to. Any chance someone can show me a pic of their engine bay where this should connect please?
See the attached pic.

 

[s130]

I think in the 80s Fiats the models with Econometers were all simple vacuum driven from the carb/inlet manifold, many with no sensor but just a simple vacuum gauge setup.