I think at this point you might need a new cable, since the connection socket most likely loose on the inside. Once you got a new one, try ziptying the ends below the connection joint (to ease the stress on the joint), ziptie it to the frame (as you did last time) and bonding the connection itself with epoxy resin (could be found in hardware stores).
While using adhesives (epoxy), make sure you cleaned the surfaces very well