I doubt FIRST will release any documentation. They usually don't for specific sensors, even if included in the KoP (for example, encoders). For the ultrasonic sensor, you only need to use three out of the four wires. The wiring diagram can be found here:
http://www.ab.com/en/epub/catalogs/1...-Diagrams.html
The Brown wire connects to your positive voltage, the Blue to your negative. You
might be able to get away with plugging it into the +5v of the RIO, but you'll probably want to get the +12v off of the VRM for it to be stable. Then the black wire is your analog signal wire to be used in the analog input on the RIO. Oddly enough, I can't find a data sheet or instruction sheet anywhere, But the white cable is your remote teach cable. I would try and put things at different distances while pressing this button to try and see it. You results may vary.
The Photoelectric sensor is very similar. You can find the relevant information here:
http://www.ab.com/en/epub/catalogs/1...205/print.html
Brown is your Positive voltage, Blue is your negative, and black is your analog output (going to the RIO's analog input). The white seems to be relatively necessary as it serves the same purpose as the push button on the sensor itself. All you'll need to do for both of these is chop of the end of a female PWM cable, leaving some space, solder in your wires according to the wiring diagrams above, and then heat shrink it all or wrap it in electrical tape. It's certainly not the prettiest way of doing it, but most teams don't have the time to crimp their own PWM cables.
Hope this helps!