If you look at your transmission you my see a rubber plug in the bottom of the bellhousing.
That means that the torque converter has a drain plug in it.
It also means that the converter must be timed to the flexplate. It may bolt on in any of the four holes, but only one will be the currect balance.
Easy to find the right way to mount. Look for the drain plug on the converter.
The converter is not internaly balanced and the drain plug must be mounted 180 degrees opposite the counter weight on the flexplate.