Dish Network DuoDVR 625 - Manual (Page 136)

Page 131
DISH Pro Wiring Diagrams
One DISH 500 with a DISH Pro Twin LNBF, One Dish Antenna
with a DISH Pro Dual LNBF, and Two DISH Pro 21 Switches
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.
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.