You just have a single fuel feed line right? So both pumps feed the same thing.
Don't know why you need two relays there. You can wire them seperately one for each pump but seems to me like it would make more sense to just use one relay.
Running larger wire, comes straight off your battery. Run that into the white terminal of the relay and the other side to the pumps.
Run the stock signal line to the blue and the other side to ground.