Wiring experts

[WTFWSAT]

I noticed a few days ago that the relay plugs for my fuel pumps are getting hot enough to deform the plastic. I have fuse pigtails coming off the battery that are 12 gauge wires with 20 amp fuses that go to the relay. On the 87 pin going to the pump the wire is about 4" of 12 gauge then butt connected to 10 gauge all the way to the pump. This is the pin that is deforming the most.

Also in the pic attached i have the 30 and 86 pin straight to the battery. I know the 86 pin should be on a switched 12v source but the big stuff 3 uses the ground pin 85 to control the pumps. Is there a better way to use the relays since my on/off switch is through the ground pin?

Could the relay pigtail wiring being too small? Do i need to ditch the pigtails and just run bigger wires to the relay?

Thanks