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what about this?? does this go into ac compressor? block? hose?
There is a plug on the block right behind the AC compressor. APS also has a written instruction matching the diagram. Explore around their site. I suggest you read that written instruction carefully.
These diagrams will help you tremendously with your build. Heck, even my korean mechanic who can't speak a word of English had no problem installing APS ST and TT with these diagrams.