Four wires, two long, two short, so they would all end at the center of the block

cut back a little more insulation than usual

twist them together. I guess I should have soldered them, but this seems to work.

Put all four in a 10-gauge heat shrink butt splice. Connect to the outbound wire

set of ground wires with relay terminals on on the four wires, a ring terminal on the single outbound wire

Ground wires installed in block