As Button says, the grease nipple (zerk) is not at all easy to see. Yes, you can get at it through the hole in the transmission cover, but you need to be sure that the grease is going through the nipple and not escaping around the edge. Flexible hoses on grease guns have a tendency not to sit skewey on the nipple. You could use a mirror and torch after greasing to check for escaping grease. I go to the effort of removing the transmission cover to grease the clutch bearing to be sure that the grease is going where it should. A good mod would be to make an extension so that the nipple is visible just protruding out of the hole in the transmission cover.
