Seaward Products
made the original wireing harness, and sells upgrade kits for them. I don't know who made the pannel (probably Catalina), but Seaward Products also makes these items.I bought the kit to upgrade the wireing harness for my '87 C-30 with a Universal M25XP engine from them, and ti worked fine.Contact Catalina Yachts or Seaward Products to get all of your questions answered.SteveAlchemist C-30T #4764Alchemist C-320 #909