no each one will have its own cord (which you will have to buy) and then plug them all into a power strip and plug the power strip into the thermostat.
(they can't connect strips together)
one more question. Is there any way to wire each shelve of flexwatt together and buy one wire/clip set and then just plug that one into the thermostat to run all the levels of the rack? Or do i have to have an individual plug for each level?