This is from the FULL GAME RULES listed on the Miggle site:

"12. The pass is attempted with the triple threat quarterback. When attempting the pass, the quarterback may be tilted as long as some part of its base remains in contact with the board inside the footprint of where the base was at when the switch was turned off. The offense has only one attempt in which to complete the pass. If the pass is complete (see definition of completion), proceed to Step 11. The offense may elect to take an automatic incompletion ("throw it away") provided that at least one receiver is open to receive a pass. If the offense misses the pass or opts to "throw it away," then skip to Step 12. If the offense throws an interception (see definition of interception), then the defensive player becomes the ball carrier. If the defensive player is engaged, then the ball is down at that point. If the defensive player is not engaged, then it may be angled and adjusted. Play continues in Step 11, but with the defender as the ball carrier and with the offense becoming "the defense."

I haven't gone through the rest of the details in the book, but I don't think it explicitly states anywhere, the "position" of the coach during the passing procedure. Since that appears to be "undefined" by the rules, I guess it is generally understood that the coach can attempt the pass from whatever angle is best, as long as his TTQB is positioned according to the rules.

Of course, I haven't played in a tournament...so I am sure there are many others who know better than me...but looking at the rules, that would be my interpretation of what is allowed.