Cracked Hinge

As the title suggests, I have a Gameboy Advance SP 101 in graphite. Theres a few cracks around the hinge area, it's been like this since December. I have seen online and considered plastic weld like Plastruct or JB Weld but I don't know how to use it. I'm not interested in reshelling as I want to keep the OEM look. If you have any suggestions please let me know.

Thanks