For the iPod Classic battery connection FPC connection, they are sold, are repairable, and are not difficult to do with a solder iron, thin tip will get it done. The part is easy to remove, easy to solder on for someone with experience. Take it to a professional to get it done. There are times when some of the solder pads are lifted but even then, they can be repaired, just some re-routing of the connections using thin wire. Avoid the epoxy and use solder, repair as it was meant to be repaired, don't rig it up. You will just waste time. A professional can get it done with solder, using an iron. https://www.facebook.com/Zfixit/photos/pcb.994796067201330/994783780535892/?type=1&theater