Get yourself a regular serial cable to go with it. That or a pair of gender changers (1 male to male and 1 female to female).

Why? Because your processor has those little nuts and your usb to serial adapter has them also. This will block your ability to plug the DB9 end of your USB to DB9 into the DB9 connection on the processor.

Some times you can unscrew the nuts from one or both devices and sometimes it causes damage to the DB9. The regular serial cable should have screws that can be backed out of the way. Or just use the double gender changer method to extend your connection point beyond the nuts.