Have you actually seen what an unregulated heat source can do?
Wish I would have taken photos from when I got her. All the puss and stuff oozing out of the cooked skin.
This is the proper way to set up heat.
As long as all of your heat pads are the same you can plug them all into one power strip and then plug the strip into the thermostat.
Attach the probe to one of the mats and then fine tune it from there.