I came across this on some site..
It is a Digital A/C Climate Control System that replaces our existing A/C.
As i was Googling this Climate Control system i found that you even get a diagram that shows you how to connect it to the S13. And i think the A/C comes from a Maxima...
sory bud but google will be your friend as far as i remember you cant to it with the s13 you get 3 types of climate controles tingy ,burn ,cold hahaha kidding no serious you get 3 types you get the one like the s13 then the s14 then you get the digital im sure you can only swop with the s14 models