Hi. I've got a 2005 2.7L V6 Tucson (Automatic). I want to change the transaxle fluid but can't find the drain plug. Any guidance would be appreciated!

 

Item A on the bottom of the transaxle:

 

ATF dipstick ... COLD reading:
Hi there. I recently purchased a used 2006 Tucson V6 FWD. I am unable to get a reliable HOT reading on the ATF dipstick and was wondering if a COLD reading would suffice? My dipstick has a thin double line below the COLD marking but none above that word. What would be the acceptable range for a COLD reading ? I would appreciate any help given.
Maggie