Here's a picture of the Solenoid Breakout mounted on the cRIO Solenoid Module:
Note: the Solenoid Breakout looks similar to the Analog Breakout. One way to tell them apart is by the two-pin outputs on the Solenoid (Analog has three-pin outputs). The Solenoid Breakout is also shorter than the Analog Breakout.
The Solenoid Module (the one with the two rows of green leds) slides into slot 8 in the cRIO chassis (the furthest from the flat part with the power connection and Ethernet ports).
If you need more, slot 7 can also be used (if you buy or borrow another Module and Breakout). Slot 8 is the code default though, so I'd start with that one.
this might help. There are some code samples there too.
Wiring from the FIRST wiring diagram. Each set of wires from the ends of the solenoid get connected to one set of pins on the Solenoid Breakout shown above.
The KOP came with a bunch of two-wire gray cables with two-pin connector housings on each end. If you cut one of these gray cables in half, you can use each bare end to wire to the solenoid bare wires and at the other end you'll have ready-made two-pin connectors that match the two pins on the Solenoid Breakout. Do make sure ground gets connected to ground when you plug everything in.
Finally, the Solenoid Breakout also gets a power connection. That white connector in the first photo takes one of the white wago connectors that came in the KOP. The solenoids that you've received in your Kits are 24v solenoids, so you have to wire a white wago connector to the two spare connections on the cRIO power plug located on the Power Distribution Panel.