The 722 is suppose to be almost identical to the 622 that I have.
TV1 has several outputs: HDMI, Component, S-Video, & Composite; as well as a Digital Audio output.
TV2 has a single Composite (Yellow Video, Red Right Audio, White Left Audio) output.
However, as Pepper said, there is an RF Home Distribution connection that will output both TV1 and TV2 on a single cable throughout your house. Go into the menu to set it up.
I'm not familiar with the 522, so I don't know what channel it used to feed your TV and Tuner Card, but suspect it was probably Channel 3 or 4. You should be able to take the cable from your Tuner Card Input and connect it to the 722 Home Distribution connection, then set the card to the same Cable or UHF-TV channel as your 722.
The 622 TV1 and TV2 outputs are limited to the following Channels (Frequencies):
- TV Channels 21 - 69 and
- Cable Channels 73 - 125
Don't forget to activate this mode and set it up.