After I got the torque converter out, there is oil coming out on the center of the converter. Is this oil is separate from the transmission? Do I have to replenish the oil? There is plug on the side of the torque converter. Is this the plug where you pour oil? Please guide me.

__________________
94 E320 Silver 210000 miles
94 740il Pewter Green 97000 miles- Retired
05 S430 4Matic
07 Lexus IS250