I'm a bit confused how you are wiring the switches. In general i would think your goal is use one to control power to the system as kinda a safety switch, and the second perhaps to select between PID control or element on 100%. These types of switches are nice as the contact blocks are modular and stackable. For a 2 position switch, the first goal basically is all or nothing and can be accomplished with either 1 NO and 1NC contact side by side, or 2 NO contacts stacked on top of each other. If the second switch is just a selector switch between PID(auto) or manual element control, you will want 2 NO contacts or 1 of each stacked.
As for the control on the PID, it is in no way rated for the amperage you will be running through your element, so it's control signal is wired to the control side of the SSR which handles the output to the element. Also, as the SSR will be dissipating heat, make sure there is either a heat sink included or you buy one as well.