As a tip, try using a voltmeter. I've tried reconfiguring one of those before, but ended up shorting a trace, which burned.
If you can look at the traces, you should be able to figure out the proper pinout. Each segment is labeled with the letters A through G.
It does indeed run off of a 5 volt source. You might try an alternate supply of a couple of AA batteries, just to get things figured out.
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