Galaga Enhancement Pack / High Score Save Kit

Older version of a Bally Midway Galaga Enhancement (E-Pack) / High Score Kit. We found this one while clearing out some old kits from our game restoration days.  Appears to be a high score save and enhancement kit for an original Galaga circuit board (Version 4.0).  We do not have the install instructions (they are online though).  Kit was never used and is complete. See photos for more details.