I know I have at least one CF adapter that will not work in WS/PDQ because it uses a different layout for the master/slave/cselect pins. In that case the only option would be to snip off those pins and bridge on the PCB or desolder and attach some wires to a glued down header for easy jumper use.

Or, you trim&bridge the WS/PDQ's connector, but that seems like a less ideal fix.

As for identing the adapter's pin1, is there a gap between the regular pins and the select pins? can you follow the traces from the CF slot?