Go here: https://my.dish.com/customercare/prepLogon.do Should be able to just click on the link above. All you will need is your account number, and follow the instructions for creating an account and then you can get to simple to use wiring diagrams based on your setup. Hope this helps and good luck.
U need a wire coming from the 722 receiver going to the 2nd tv. There is a port behind the receiver that says 2nd tv, From there u take the wire(RG-6) to the back of the tv and connect. Ur tv will be on channel 22,60,73 or 116. U may also have to do a auto search to pull in the channel.
This can be complicated to do ur self. The way I showed u is one way. There's also another way that could be easier. U would need a diplexer. If u would like I can talk u thru this if u want me too. Just let me know.