I've instralled the newer thermostat caps, gaskets and spring s on my 1986 140. I removed the water control on the thottle, my question is this.. The water control vale had 3 lines connected to it, 1 goes to the tell tale. 2nd one went to the old thermostat caps(been removed). the 3rd went to the midsection just below the powerhead with a tee in that goes to a wat3er pressure gauge. What do I connect that hose to? Just the pressure gauge? Plaese help. Thanks in advance.