You want to keep your cable as short as possible.  The longer the cable, the more cable loss you will have.  I put the IridiumGo inside the cabinet above the sink.  It is just below the steering box and thus there is only a 6' cable to the antenna.

https://www.youtube.com/watch?v=JHpFEHGCyqg
At 6:54 minutes you will see the installation of the IridiumGO..  The best place to get the service is through PredictWind.

I have a 15M cable that I didn't use because of the cable loss.

Ken