Originally Posted by danb35
The load would go across the COM and NO terminals; the coil is the other two.
Probably not the best way to state it since this appears to be a Single Pole Single Throw relay.
I will assume that the photo is the exact part number. Referencing your diagram, COM for both relays would connect to the SSR output HOT. NO (normally open) of each relay would individually connect to the HLT and Boil receptacles HOT.
The other two, apparently unlabeled, connections are the coil with one connected to Neutral and the other connected individually to the two HLT/Boil Select switch output HOTs.
BTW, I wasn't able to view the diagram zoomed but I don't see the required Neutrals connected to the HLT and Boil receptacles. You'll need those.