Nice looking work, the controls are in that cabinet with all the relays, might be a custom built cabinet by Power Integrity? Used because you have to switch all power( AC, Intercom, Data, Cat 6) off to a dispenser for maintenance and for an emergency. Those VFC drives have changed very little since the 90s. I see a Gilbarco data box, soon that will be eliminated and everything will be networked like the card readers are now. Most likely a Gilbarce Applause box somewhere for gas station TV.
I'm helping install 13 new dispensers right now on a job. Dispenser upgrade required to get new chip readers which is required by Master/Visa by Oct. this year. Wireless Comms between pumps and building eliminates a lot of the controls for shut downs.
I'm guessing the cost for the gasoline side of store, pumps tanks dispensers, canopy, conduits wiring etc is north of a million bucks