Connections on the SSII.
Black is to 110 AC power
Red is to the Auger motor
Orange is to the Draft Inducer Fan motor
Purple is to the Ignigtor Rod, IE Hot Rod.
In all cases, other then the Thermocouple, the White Wire is the neutral wire and the other color wire is the Hot Wire.
You replace the RTD in your unit with the provided Thermocouple which plugs into the front of the SSII.
The connectors are Molex and are available at Radio Shack.
Other comparability issues would be the size the hole where your current controller is mounted, the clearance behind the controller and the mounting holes.
As muebe said "The SSII can be made to control any pellet grill." or other on/off operated systems. In fact I have a Savannah Stoker running my Sous-vide cooking system that I am experimenting with.