Hiyall - i've been hanging around the past couple of weeks since researching the Odyssey and now, actually owning one (2012 EX-L RES in Plum-something color).
I dug into her today as I thought my wife would prefer plugging her iphone 4S in at the center stack vs reaching over into the glovebox. I wanted a clean install with no wires visible outside of the cubby drawer so, I began to disassemble...
this shows the glovebox removed - typical of most gloveboxes in that you squeeze the lower panels together to release and it is hinged at the bottom...pull straight out to remove from hinge...that door close looking cylinder is just that - a soft-eject feature for the glovebox door. it is easily removed from the door upon removal
this shows the center cubby drawer with integrated cupholder after i pulled it past the stop. you basically are doing the same thing as the glovebox - where the white felt stops are located (highlited in the spotlight in the photo along the drawer glide) are two tabs that need to be pushed in to release the drawer from its catches (believe me - i searched for a route for the cable above / below / around the drawer to simply drop the cable in from...it doesn't exist without drilling, or, as you're about to see - routing the cable thru the side glide gap...
here is the cable shown coming thru the rail on the right-hand side of the center cubby drawer with enough slack to come over the top of the drawer lip with little if any friction felt afterward!
this is the final look with wife now able to connect iphone (she has the 4S and it works fine so, i assume previous gen ipod phone products do as well only limited by the internal stereo capabilities - this is merely an extension of the usb feature) inside the cubby drawer (I'll look into adding a dock inside the drawer in the future to hold the phone upright).
here is a look at the final product inside the glovebox - note the pre-existing slit in the backside of the glovebox allowing safe passage of the iphone cable thru to the console's innards...
here is a look at the proprietary (or one i'm otherwise unfamiliary with) USB connection coming from the radio (this connects to the usb port inside the glovebox)
this is a look at the underside of the front / center console that is easily removed by pulling on the handle at the front of the console at floor-level then lifting up on it. I'm not sure how handy this is nor why it has a handle included (shhhh..i haven't read the manual fully yet)...and, what else could this console mount be used for other than extra cargo space?
anyway - hope it has been of assistance as I didn't see anything related during my brief search...
Brian