You sound like you have the information pretty well in hand! Congratulations! I am not sure which model you are considering to get, the Slingbox PRO-HD or the Slingbox SOLO. If you search the word hookup, on support.slingbox.com, you will find information on the hooking up process for the cables for each. Also, at setup.slingbox.com, you will find the process to get the configuration of the cables and Internet Viewing test. This process includes getting the cable box and remote set up for computer use and mobile device use.
I suggest you visit our web site at support.slingbox.com and then review the many articles on hook up and setup of the Slingbox.
Here is a link to help you: The most frequently asked Slingbox set up questions.
Hope this helps with your issue!
Have a great day!
Sling Moderation Team