Hi obiwan,
The transfer case is sitting above the
U-pipe upfront, please see pictures
in step two of guide below:
http://www.mazdas247.com/forum/showthread.php?123847373-Changing-CX-9-transfer-case-gear-oil-(photos)
Thanks Avidien. Ahh... I remember this now DIY post but didn't recall that it had pics of the location. Will check it out tomorrow. Thanks much.