I'm just some guy... RULER OF THE PLANET OMICRON PERSEI 8.
iPod 3rd Generation Battery
Had a T7 security screw driver [and didn't want to wait to have the T6 version shipped to me], so I gave it a whirl. I lined up the driver with the screw socket, pressed down a bit to make sure the driver would get enough grip, and slowly [but forcefully] rotated the driver and got these screws out. BE CAUTIOUS not to strip the screws. May not work for everyone.
The bottom of the hard drive SATA Connector had a bit of black tape on it holding the Mac SATA connection to the bottom [circuit board side] of the hard drive itself.
Check to see if yours has this as well before applying too much force removing the SATA connector from the hard drive.