4'' Sure electronics display for Scoreboard

I've been trying to build a scoreboard for shuffleboard. just score for 2 people limited to 21. with an up and down button for both players. i bought an arduino uno and i can't figure out the wiring off the code i found. can anyone explain it to me or help me out?

that is the code i'm tyring to use. i can't get anything to work right.

also forgot to mention its a 4'' sure electronics set of 2 2digit 7 segment displays

EDIT:
You’ll want to look at http://sure-electronics.net/download/down.php?name=DE-DP004_Ver1.0_EN.pdf

You won’t be able to just connect it up to an Arduino Uno, write a sketch, and go.

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what do i need to do?

Read the manual.