Where to place Manifold pressure intersection/firewall penetration?

[swisseagle]

Hello

I should drill the hole in the firewall for the fitting which brings the manifold-pressure into the cockpit area and also T the line to the two PMAG.

Is there a recomondation where to place it heightwise?
I mean, does the line from the PMAG should only go down, so that no condens water/fuel or so can run into the PMAG's.
Or is it enough to place just the firewallfitting highter than the Engine fitting and the line to the PMAC will go downward?

Maybe someone ore Bill Repucci has an answer or thought about this.

Thanks,

Dominik