Hey there, I have a 1967 Evinrude 60 HP Sportfour. I am wanting to fire it up to test run, (at idle only) and I want to make sure I am supplying water to the right pick-up. Just above the prop on the left side of the lower unit, I have a removable plate approx. 1" by 6". In that plate there is a screened slot about 3/8" by 2". This looks to me to be the water pick-up. Am I correct? My Secor manual doesn't show this well. Thanks Zeph