Opt Laser mount for Z-plus

Ok, I have a question for the smart people out there.

I have mounted an Opt Laser (Shapeoko kit) on my Shapeoko XL:

I have done almost everything I need to do, however, I’ve run into a roadblock. I have these two wires:

The brown one goes to PWM and the white to ground. It appears they designed this to go with an Arduino which has a place for these wires to plug in. I have the CarbideMotion 2.4e which looks like this:

The only PWM and GND I can find are on the upper right side:

These are labeled but there are no connectors there for them. I also have the BitSetter and the BitRunner, so when I get everything plugged in, it gets a bit crowded.

Is there another PWM/GND I can use?

Is there a plastic socket/plug I can add to this board? (Note that the other plugs seem to crowd it a lot)

Should I simply solder wires onto the PCB? I would prefer something less permanent.

Any thoughts or suggestions are greatly appreciated.

-e