Soulmagent - No there is no link but SA talks about both xboxes in his interview with BTH and his interview has been transcribed. From how he words it, DD has his new xbox and SA has DD's old one.
ETA - From Case Signal - SA interview transcripts:
"Shawn Adkins: I don’t know. I think my Uncle Cody sold them a while back.
Host: The Xbox, is that still at your house, at Billie’s house?
Shawn Adkins: David’s Xbox, he took that with him to his Uncle Roger’s house, but there’s another Xbox in the house that used to be David’s, and when he got a new one for Christmas, he gave me his old one, and I’ve only played it a handful of times. I’m really not into video games that much.
Host: Did you ever use thumb drives in that?
Shawn Adkins: No."
I'm not sure if I am allowed to post a link but you can find the transcripts by googling "Case Signal Hailey Dunn" and clicking on the "Transcipts" tab.