Installing a water pressure gauge

[javelin204]

I bought a Teleflex Morse 30 psi Water Pressure gauge. I have a 1993 Evinrude 200XP. Where do I connect the water line? There is a 90 degree fitting at the base of the rear of the block. It is exactly the right size for the water pressure gauge hose and is plugged. Can I unplug it and use it? I heard my motor may require a 60 psi gauge. Can anyone help? Thanks, Ray

[Dhadley]

If that fitting is in the adaptor plate then that's the right one.