Oiling problem. HELP!!!

I was just out looking at another block that I have. If I had to guess, the plug in the oil filter adapter area is the one I'm missing. That's an easy fix. The next in line would be the ones at the front of the cam. I know the ones at the back of the cam are there. I could not see any plugs or places for them under the rear main cap. Are there any others I might have missed?

Jack