A/C service manifold

So that is just the middle hose end?> I was actually planning on using a side tapper and Dust-off....really! You see, I got a slow leak somewhere and I dont drive the car that often so I dont want to dump $35 twice a season into a leaking system. Lexus SC400 is a PITA to work on as everything is so tight in there. Looking for a leak doesnt sound fun. Im already dreading the "Camshaft valley" starter overhaul Im afraid I have to do soon: New battery, random slow cranking starts. I think its the ring contact that the solenoid contacts.