transmission cooler in a 93 question.

Hi,

my 93 have a class III hitch/3.23 rear axle, and I'd like to put a transmission cooler.
which are the transmission hoses from the back of the radiator?
there are two metal lines on the right side, and two rubber lines on the left.
Which one are for the transmission?
Any other thing I need to take into consideration before putting a transmission cooler?

Thanks.

PS.
will this be a good option for this car?
http://www.amazon.com/gp/product/B000CIGE9G/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

Transmission lines should run along the passenger side from the transmission to the radiator. The other hoses should be the engine oil cooler lines, which run from the oil filter adapter to the radiator on the drivers side of the car. If your 93 has the tow package it already had a transmission cooler and an oil cooler built into the radiator.

thanks,
so the metal line are the transmission.

is the transmission cooler built-in in the radiator as effective as putting an external one like the one I linked?

here are the specs of my RMW.
http://www.compnine.com/mycar.php?id=b32aac65da90ed36a6a3a2f0fe10c4cd