Move the scale,

Not wanting to give up after that much trouble, Micheal searches around for the zipper. While scaling (pun intended) the entirety of the dragoness' back, he trips on the white scale. Angry at first, he then wonders how he could trip over a smooth surface, he slides his hand on the white scale, and pushes it away.

Under the scale is the zipper he was looking for, so he swaps the zipper tab with his own and slowly unzips the giant dragon, and is appalled to see the same mannequin that was in the normal suits in her, albeit being dark blue. Sliding the mannequin out with little resistance, he sees a small pocket in the front of her cockpit, probably for males.

He steps down into the Hollow point of the dragon and slides his feet into the dragon's interior. After making sure they are in there correctly he flexes them, and even with the dragon's feet being twice as big as his body, they copy his own movements. Sliding his arms into the dragon's entries also gives the same odd effect, flexing his new clawed fingers he remembers the zipper.