First welcome to the forum. You should have added another post to ask this question on your Satellite feed. This section is to introduce your self and for us to welcome you to the forum.
But, I will answer your question. I would do a search in the Tec Corner, for your answer. I and other members have discussed this issue when installing our Satellite TV systems to our campers. There are a couple of different ways this could be done and the way all of the members have done this installation will provide information to you on how you could do yours. Each way is unique.
Jim & Jill
2010 318SAB Cougar
2008 Dodge 6.7LCummins the original 6.7L engine, w/68RFE Auto