Moving creates a ? mark against you.
If your letter of Introduction is holding some content then the question wil be to
1/ why did he move?.
You better have a good reason that is spiritual.
Tell them the CO at your old congregation indicated their congregation need help and was weak, but you cannot discuss that more as you were told in confidence. If they want to know more talk to their CO.
So you thought you would move to do what you can.