does anyone know where the sealing plug hole is on a 2000 s4
 

trying to screw in the lock pin (3242) but can't find sealing plug hole.

trying to find location for tool 3242

Is that the crank lock pin? I believe it is back by the flywheel.

I believe so its to stop the engine from moving while doing the timing belt or watevas

It's further back than you think and up on the block. You may need to remove the turbo
 

hardpipe (the one with one black screw and one silver one) that attaches to the oil pan to get good access to it.

The hole cover is shaped like a black figure 8 where the one circle of the 8 is much smaller and contains the screw that fastens the plastic cover.

I had a bear of a time finding it when I did my TB because the Bentley picture is totally wrong and less than helpful.

I never bothered using it. Didn't really matter. Couldn't figure out where it went anyway!

It's just aft of the A/C compressor . . .