I have a rather urgent question as I need to order the side pillars for my racks by tommorow and need to know this about heat tape and thermostats.

I know that if you have heat tape on multiple racks/shelves that are IDENTICAL in length and also identical tubs, that you can plug all those into one set of thermostat, with probe on one shelf, and it is fine. If you have two racks with identical set up and heat tape, you can plug both into the same thermostat with probe on one rack and it is fine.

Now, this is my question.

I have TWO racks. The tubs are identical. The heat tape length on EACH shelf is identical on all of them for both racks. HOWEVER, one rack has 7 shelves, the other has 6 shelves. Each rack has one single electrical plug, and all the heat tape is wired together from top down one piece directly to the next (the wires going in and out of each flexwatt strip is on the SAME side of the heat tape. For the life of me I can't find if this is called series or parallel.) The diagram below shows what I mean.

Can these be plugged into the same thermostat set?