What's next is the sinking feeling that you are massively out of your depth followed by humiliation and an about turn in which you reject my case 'because'it is valid. That's my bet anyway.
You accept, then, that this is valid:
1. If moral imperatives are imperatives of Reason, then they all have a single source: Reason
2. Moral imperatives are imperatives of Reason
3. Therefore moral imperatives have a single source: Reason
And you accept as well that this is valid:
1. If something is issuing imperatives, then it is a mind
2. Reason issues imperatives
3. Therefore Reason is a mind
And you accept as well that this is valid:
1. If Reason is a mind, then Reason is omnipotent, omniscient and omnibenevolent (God)
2. Reason is a mind
3. Therefore, Reason is God.
And you accept that this is valid:
1. If moral imperatives are imperatives of Reason, then they are imperatives of God
2. Moral imperatives are imperatives of Reason
3. Therefore moral imperatives are imperatives of God
Or you don't as you don't know what you are talking about. Slink off, that's my advice.