I've scanned and reproduced the labels for the high voltage cage and channel alignment. Take your pick - faded or new looking, print them out and glue them on
Here's the HV cage 3" X 1.125"
Scanned
Reproduction
Here's the Channel Alignment 4" X 0.625
Scanned
Reproduction
Tube placement 3.25" X 3.25"
Scanned
Reproduction - N/A
Here's where they go: