Nice MacGuyvering mate! You can see that the top has split laterally across from the break at that section of purfling ledge.
As Simon says you’ll probably need to fix something on the underside. It might be possible to fabricate a small thin plate to cover it but you’d need to also find a way to clamp it accurately in place.
you could make some basic f style clamps with hardwood and all thread to get in there and clamp it all securely together.