Dunkirk boiler ignition control module

hi folks, I see this old thread but relevant to my case a bit. I will be replacing the 1003-611A module and was thinking about changing the ground spade connectors as the old ones are pretty corroded. i however cant figure out the size that i need. Really appreciate if someone can help me with what size of spade connectors i can use. and what material would conduct best. the existing ground wires dont have any gauge (AWG) info on them. Thanks much in advance.