My battery swelled and it was not possible to push out. Looks like I cracked the screen trying to free it up inside the case.

Use the pointed tip of a black spudger to hold down the white part of this connector. Then use angled/offset tweezers to pop up the brown part to release the cable. when reassembling use the black spudger or your finger to pop it back down. Give the slightest tug and make sure you get some resistance to ensure a good connection. Do not

I preferred to flip up the drive and pry from the side to the left in this picture which would be underneath the drive itself. The black spudger is your best friend for prying miscellaneous iPod connectors.

I don't see a need for this. I just removed my battery without touching these.

Mine had plenty of slack to lay open like a book without disconnecting. Check this first and don't mess with it if you don't need to. It's not necessary for changing a battery.

No way you're getting a pick in there. I tried and it's too tight. Start with iPod opening tool to make your gap. Hold it open and wiggle in a pick. Then wiggle and slide the pick up and down the side and it pops right open.

This step should be moved to the front and the heating steps should be deleted. There is no reason to apply heat for the battery replacement so why risk it and offer it as a solution?