Overall, the economizer is a thoughtful addition that tr a clever way.
2X 871E-1A-D-R1 U15 Relay 12VDC 4 Pins 35A Micro ISO OEM Automotive Relay
A nice touch is the Warrick Controls brand, which feels familiar and easy to source.
You will find that the UE10-3OS2D0 pairs nicely with DIN rail bases you may already have.
If you keep spares, the G8HE-1C7T-R1-DC12 label helps you restock without second guessing.
You will find that the TimeSaver brand runs cool, so it plays well parts in the enclosure.