Dave,
To check the level, remove the fill plug and stick your finger in the hole. You should be able to "feel" the fluid level even with the botton of the hole..... providing the car is level.
To top it off, I remove the shifter boot and stick a plastic hose through the opening in the tunnel and insert it into the fill hole. I then add a little at a time via a funnel hooked to the plastic line. Just keep adding a dab at a time until the fluid runs out of the hole. Put the plug in and clean up what spills on the floor and your done.
- Jim -