where to add damping fluid on a vpi jmw10.5i

Damping may not be beneficial at all. After you set up your table and cartridge with no fluid in the well, add only 1 drop of the oil at a time....then listen. If the sound becomes cleaner, clearer, with more depth and air, add another drop, etc. When the sound becomes poorer, remove a bit of the oil with a Q-tip, and listen again. This adjustment takes time and you very well might be exhausted when you finish.

Harry's manuals, when present, leave a lot to be desired. VPI depends on the dealer network to do the 'heavy' lifting.

lift the arm off the spindal, and there is a well area where the spindal sits. You add it in there.