Trans Cooler Install ... HELP!!!

I just finished installing my SPT-2 VB from Silverfox and decided to tackle the cooler at the same time. I have the cooler mounted behind the front bumper and am ready to hook up the lines. Its a FMS cooler and it says to hook the cooler "in series" with the factory cooler. Meaning, it must be hooked up so the tranny oil flows through the FMS cooler AFTER it flows through the factory cooler (attached to the radiator obviously).

Question is ... Which line is the return line to the tranny and which line is the feed line to the factory cooler from the tranny on a 92 LX 5.0? Thanks in advance!

That makes sense. The car isn't driven hard that often. I only take it out like once a week if that...and maybe twice a year to the track. But I will definately keep that in mind incase I run into any problems. Thanks guys!!!