snake heat mats

Good morning all I'm just wondering instead of using a few of these could I take the plug of one of my heat mats and wire it to another plug there both them same 7watts and then plug this into the thermostat?? Anyone tried this??? Or any other ideas? Thanks

Where should the probe/sensor be placed on a heat mat? I have had the thermostat for a few days now and when i place it where instructed it doesnt heat up the mat at all. it is constantly off, and when finally comes on only stays on for around a minute or two. then when i feel the mat, it is...