Ahhh - It won't hurt.
Just connect the green and red wires to the terminals (either one, if they aren't labeled.) The black and yellow wires - just tape them up. Let 'em hang.
If the phone doesn't work, switch the green and red wires in the box. (use a cheap phone to test it - and don't use a cordless. That's adding unknowns into the test.)
Try it and see...
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