There are eighteen of them.
The number "0516" on the spinning dial lock will open the secret compartment in Captain Ziggs' quarters atop the Hub. The number is revealed in the Mayor's office atop the Center. (Using the switch on the Cantina, the extension arm, and the multi-tool to open the skylight.)0516
0516
its for a code to get into the captins courters
The answer you are looking for is 0516 again the code for the picture is 0516
0516
The number is on the typewriter, "516". It is the combination (0516) to the secret room in the Captain's Quarters atop the Hub.
0516
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0516
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0516
There is no password, but the combination for the safe is 0516.