Space heaters pull a lot of current, far more then a lamp.
See if you can figure out the current rating of the heater, and the current rating of that S108T02, if the heater is going to pull more then the S108T02 is rated for you can't do it. If there about equal I still wouldn't use the space heater on the S108T02 because continuously drawing its max rated current gives absolutely no tolerance for random spikes and can lead to thermal run away and failure.
As far as wiring there was a pretty easy to see picture in that link, control side looked to need Vcc(5V?), GND, and a control voltage from a pin. The other side is just like a series switch wiring.
I didn't read the whole thing, someone else might say different.