Transmission cooler lines - which ports

I have a Champion radiator and ran new cooler lines to the radiator a while back.... (727)
The radiator is an upper / lower tank configuration.
The transmission cooler ports are a left and right configuration on the bottom tank.

Does it matter which line goes to which side?
If the ports were vertical, I'd understand the hot fluid on top and the cooled fluid coming out the bottom but these are horizontal. ...I don't think it matters but thought I'd ask...

Thanks!

Jeff