I just bought a 1987 268 sundancer. twin merc 205 with alpha outdrives. The starboard engine has a place to add oil on the valve cover. (as I thought all engines would have). There is NO place to add oil to the port engine. Only through the dip stick. I asked the broker who sold me the boat and he could not believe me. Thought I just couldnt find it. So he came out "to show me where to add the oil". And, well he said he has never seen this before. Is there something I am missing.? Why would the valve cover be replaced missing the place to add the oil? Any thoughts?