Marty previously posted this, here's another look in case you missed it. This works for the LCRU2 boards with the white connectors.
INSTRUCTIONS TO RESTORE TMCC FUNCTIONS (R2LC/LCRU 2 CIRCUIT BOARDS)
@RON ARNDT 091718 posted:John,
It looks like both us Rons have the LCRU2 boards. How do we program it to stop the blinking without being able to use the white wire method?
Ron
The previously posted parts list had yours with the original LCRU. If it does have the LCRU2, see above.