Solve the puzzle? Draining converter with Magnum flex plate

Looks like the starter removal will not help. The problem is that the flex plate blocks the drain plug. See picture.
I dont think it's a good idea to drill the flex plate. Would be difficult to find 180 degrees for second hole for balance plus debris. Then there is refilling the converter after although I could then partially fill through the starter location. How does the rest get filled? Cycling, top off, repeat?
If I did use the trans cooler lines, does it go in from one and then out the other? I don't understand how the fluid path flows through the transmission and converter. Couldn't it follow path of least resistance and bypass the converter at least partially?