Clip doesn't start, but connection to PC is OK.

No, the switch works when the player is plugged. Now, I have disassembled player (without damaging it - “I am the mastah”) - two of the wires - black and red aren’t on their places. I mean the wires between the battery and the player. I am afraid that the solder would be needed - what would be very hard, because the wires and the places for them are VERY small. Am I right?