I would like the connect my winkeyer to rear jack. Manual says, "fsk/cw (pin 4) ? Setting the Winkeyer up to the rear will let me use 2 differnet paddles with having to unplug them from the front connector.
The hardware manual says you key via grounding pin 4. So DB15 pin 4 goes to center conductor and one of the ground pins (e.g. DB15-5) goes to shield of the cable connected to the hardware WinKeyer.
I won't bother quoting the rest of the info in the manual, but it sounds like that's all you have to do because that input is always active.