Fuse box question 1975 CJ5

[dave123]

My 1975 jeep CJ dash lights quit at once the other day. The fuse box is so old that I can't tell which fuse would go to the dash lights. If anyone has a a similar fuse box, I would appreciate knowing which fuse goes where. Also, do they have a common ground? Everything else, the gauges, the head lights, etc. all work fine.
thanx
dave