Quite understandable, thank you.This is what i use with my lindsay system. one on the compressor side. You match the barb end to the hose size you want to use. Doesnt matter the hose size since the lindsay system uses so little air almost any hose can flow enough. i would just say get one rated for at least 85 psi because you can go up to that with the lindsay hand piece. Looks like 1/4 npt on the compressor and 1/8 npt stepped up to 1/4 npt on the switch side.
so you could get a 1/8 npt to barb fitting that matches the hose you want or get and just remove whats on the switch side. or get a 1/4 npt coupler and a 1/4 npt to barb just like in the photo. The hose just slides onto the barb and is held on with a hose clamp or some other connector like a crimp style.