It's not speculation. Moore said himself that he took the job with the expectation that Carr would be the QB. That's straight from Moore. It's not speculation. Thinking he didn't mean what he said is the actual speculation.
No doubt Loomis and Moore talked about it, but Carr was not involved in those talks. That's why both Moore and Loomis had to have a conversation with Carr before an agreement could be finalized. Moore and Loomis both understood that Carr had a say in the matter, so they didn't jump the gun before talking to Carr.
Hiring people is not the same as building a team of people to work together that require contractual agreements. Have you ever had to negotiate a working agreement between two or more parties that involved contracts?
Apparently it isn't.