On a 2000, I am relatively sure you will NOT find a drain plug on the torque converter any longer. About the time they started the Touch Shift is when the drain was gone on the TC.
For cleaning the pan, the bast way to go is to use solvent, then dry with compressed air. DON'T use any type of rag or chamois to dry it. Use paper if neccesary. The shift valves can cut paper fibers, but not fibers like cotton or wool (or sheep skin). Best is compressed air.
On a 722.6, the pan bolts are still torqued to 8nm, the drain plug is torqued to 14nm.
To allow the bolts to screw in better, I run a tap through the bolt holes in the case.