[Al Skierkiewicz]

You may have no more than one solenoid module connected to the 24 volt output on the PD if you are using 24 volt solenoids.
<R38> All electric power utilized by the ROBOT shall be distributed from the load terminals of the PD Board. Circuits may not bypass the PD Board to connect directly to the 120-amp loop.
A. The cRIO-FRC power input must be connected to the 24 Vdc supply terminals on the PD Board. With the exception of one Solenoid Breakout Board, no other electrical load can be connected to these terminals.

You can have another solenoid module connected to 12 volts and driving 12 volt solenoids. It appears that the wiring diagrams are demonstrating connections for specific devices not a generic wiring of all possible configurations.