Dish Network 118523 User Manual page 136

One DISH 500 with a DISH Pro Twin LNBF, One Dish Antenna
with a DISH Pro Dual LNBF, and Two DISH Pro 21 Switches
This diagram leaves out grounding to be clear. Make sure
you ground the system per the National Electrical Code
(NEC) and all local electrical codes.
When you set up your system following this diagram and run Check Switch
the Installation Summary screen should look similar to the one shown
below.
DISH Pro Wiring Diagrams
Page 131