You don't have to remove the components, just all the wires. The components obviously aren't in the way now, so why make extra work?
For the smoke unit, remove all the wires and cut the trace at the red line. You can actually cut it anywhere along the trace, that one just has to be gone. You will then have to connect the two places with the yellow circles together and connect each of those to the PS/3 smoke heater wires, (red connector). Polarity doesn't matter here as there's no ground and they're resistors. The smoke fan wires (green connector) are polarity sensitive, you want the fan to spin clockwise looking from the top.
