Thank you for the info and pics.
On the control bank, unsolder the daisy chained white wire from the last lug with the 2 white wires still attached. Just like you did on the cancel bank.
For these resistance readings switch your meter to the diode setting (just to the right of the 200 setting) better accuracy for lower resistances. Meter might have an audible for a low resistance test.
Connect a meter jumper to the double white, connect the other jumper to the double grey on the 1st shot relay coil. Take reading.
Touch unsoldered white wire to jumper on white. Any reading change?
Next remove jumper from double grey lug, unsolder the double grey wires and split apart.
Track the grey wire coming from the game over relay switch to identify one grey wire from another.
With meter jumper still on the double white, with the other jumper touch each grey wire and unsoldered coil lug individually and take reading on each.