I would like to add a more informative calibrated boost guage to my 93 945 turbo; I have decided on the autometer ultra-lite guage. The pressure lines are completely different however. I did not see anything attached on the engine side of the firewall; I crawled and contorted myself under the dash, and from what I can tell, there is nothing else attached to this line besides the guage. Am I correct, or did I miss something? That would make things so much easier as I could just attach the new line at the manifold. Thanks for the help.