On the Wenzel website (quanticwenzel.com), you can browse the list and match the size and pinout 'style' (e.g. sma + 6 pins) to your unit. Then download the pdf for that unit. As KE5FX states, there aren't that many possibilities.
Of course, since you've got 500 series units, they could have scrambled the pinouts to match the customers request.