Here is the wiring diagram I used to connect my Love TS-13010 to an ancient compact freezer. If you look closely, the original wiring diagram (black) is virtually identical to the diagram above - I am guessing that nearly all fridge/freezers operate on the same diagram (other accessory circuits like lights etc operating inside the main loop).
I did not cut or damage the freezer in any way. I merely removed the original thermostat from the unit and spliced into the existing harness as indicated. I even theaded the Love thermocouple through the original hole in the unit. if I ever had the desire to return this unit to stock, it would simply be a matter of removing the Love and reinstalling the original thermostat.
In 40 minutes the unit chilled from 70* ambient to 48* (compressor shut-off) and continued to cool down to 41* due to lag. I placed the thermocouple into a cup of water to get true liquid temp.
Overall, this could not be simplier and I still have power to the unit - I highly recommend going this route instead of killing power to the whole thing. Full disclosure, I had no previous knowledge using Love controls.