Those (pic) look like legacy LNB's so in Dish settings use single, and in switch setting SW21-1 OR SW21-2 (91-82) Depending on
how cabling is configured, You don't need to use a Disque switch, the SW21 combines two Sat's into one cable to Receiver
If you plan on using more than 1-Receiver then you would use a Multi-Switch or 2-SW21's to 2-Receivers