Starter relay question

30F4C075-46CD-4398-B843-97C1CD3B0B7B.jpeg 23E16B79-24E7-48EC-A585-815F734157C8.jpeg 1966 Plymouth valiant signet

Just picked this car up, trying to understand the wiring.

instead of a starter relay there is a buss in the engine compartment. All of the wires that would normally be connected to the big lug on the starter relay are connected to the buss. The wire for the starter solenoid goes straight from the bulkhead connector to the solenoid.

Can anyone enlighten me on this set up? Is this going to work? I would have expected to see a starter relay.