A/c Leak

[mrrcom]

I posted about this before but no replys :(

anyway i was just wondering if someone had a picture or a description of the hole i need to drill in the a/c evaporator housing so i can check if the system is leaking there. I have the legit pontiac service manuals and the picture it provides is horrible.

I put 2 cans of dye thru the system and the engine bay is clean and also the vent are too. I borrowed an electronic sniffer detector but the probe either wasn't long enough or the leak is too tiny for the unit to notice.

Im hoping that i can drill a hole in the housing a look in there via a flexible scope or using my uv light and a mirror