Your basement cable can be used for satellite TV via an external dish/tripod. It just needs little work first.
Your cable TV hookup runs from the basement to the backside of your video selector switch. It's designed to pass RF, not the highband signal from a dish. The RF then gets routed to whicvhever TV, VCR, etc that you want to view it on by pushing the selector buttons. Running a satellite dish-to-receiver feed won't work in this mode.
But, if you add a diplexer to the top end of the cable you can use that cable for dual duty. The diplexer looks like a splitter bit functions differently in that it separates a high band satellite feed from an RF feed. You connect the RF output to your selector switch just like it is now, then connect the satellite output to your satellite receiver's input.
If you have a roof-top dome or dish you would have to swap the two cables around to select which dish (roof-top or external tripod) you want to use. This can further be simplified by installing an A/B switch to select either one.