My 3ds does not turn on from battery. I found a short circuit.

My 3ds does not turn on from battery. I found a short circuit as in the picture below:

These are the things I tested:

• Insert battery: turn it on —> nothing happen (no light)
• Remove battery, plug in charger: when plug in charger, charging led (yellow led) turns on for about 5 seconds then off. Turn on the device —> nothing happen (no light)
• Insert battery, plug in charger: when plug in charger, charging led (yellow led) turns on for about 5 seconds then off. Turn on the device —> device turns on and works as normal.

These are the things I found:

• Battery fuse was broken
• There is a short circuit as in the above picture

Please help me to fix it. Thank you!