I found what seems to be a set screw on the side of the Double C Joint, i removed it and It seems to be the grease port, Am i Correct in assuming this? If so do i just need to get a needle greaser for my gun and go to town on it? Grease it up until I see new grease coming out of the joint sides? Anything else I need to know or Am I on track? First timer for this, Thank you.