[maksum]

I wasn't a fan of messing with the thermostat housing but just now after pulling it off, I think my thermostat isn't anything fancy like that, just two black load and two red line wires. It's also important to note that my thermostat connects to baseboard heaters, not an HVAC system.

[IgorPartola]

Even ones connected to fancy heating and cooling systems aren’t that complex and instructions are usually spot on. A simple heating system like you describe is, well, simple. Connect wires, get heat. I’m sure you can figure it out.