Boost gauge connection point ?

[Venny]

I posted in projects ,maybe be wrong place ... but where do I plug the clear pipe for a aftermarket boost gauge ?
I don't want to drill in hectic places . And the balance pipe on the carb is no good , I'm waiting for a pic on the air box somewhere (thanks vince ) will this work ok ? Any ideas boys
I don't really need it hence I'm a bit sceptical about drilling and stuff . Just want another gauge up there..

[Lorcan]

Tee off the hose to the fuel pressure regulator.