I agree with the in-series after the stock radiator's heat exchanger method. Some people (in frigid climates) like to recommend it backwards, but my take is:
If it's cold out, the stacked plate cooler is going to bypass till the fluid warms up (which your heat exchanger is helping with), so it's not unnecessarily cooling the fluid when the fluid is cold. A stacked plate cooler acts like it has a poor man's thermostat.
I think the AOD and AODE lines are backwards, which would mean the lower line is the return line. Dont go without checking. Loosen the line you think is the return line. Connect a fiting and hose to the radiator's heat exchanger and run the line into a bucket. Bump the starter or start it real quick and shut it down (fluid will fly out if you actually start it - but it might not come out if just cranking). If fluid comes out of the heat exchanger, goes into the ad hoc line you installed and ran to the bucket, that indicates you have the location. If the stock line spurts instead, you got the wrong line. This might all be in your instructions.
Also read up on preferences upon which way to flow fluid through the cooler. IIRC most folks like to have the fluid go into the bottom of the aux cooler and egress (back towards the trans) at the top of the new cooler.
Good luck.