Thanks all, it was indeed the black port at the back in my pic. However when I tested the pressure it was just inside the cone but as I charged it I could only get the pressure just w little past where it is in the pic below, is that expected? Seemed I charged it a lot (stopping, checking & shaking every 10-15 sec) so should I have just kept going or is it good where it is (local ambient temp according to wunderground is 85)? It was blowing pretty cold while sitting in the driveway.