@supragsx I think that is incorrect.
For your XT (AGP) version of the AIW X800 I believe you need the one in your first attached image. The X800 XT has no coax connections on the backplate of the card but does have both DVI and VGA output connections. So to use the tuner it would have needed a way to connect to a cable or antenna input. Note that the connector in your last image might also work but was sold in europe, etc. so has different style coax connectors.
If you find one of the connectors, you will also need the ubiquitous
"Purple dongle" which are readily available on ebay.
Here's a pretty decent discussion on these connectors. If you read through the entire thread, you will find a discussion of ways to connect to the card without the special ATI cables by connecting directly to one(?) of the headers on the card.
More images of your cards complete "kit" when new.
Old Newegg listing
Recent complete card sold on eBay with picture of the complete kit.