Stuck a pin in the split on the fretboard which made a very tiny gap. Got a sliver of paper and put some Titebond on it, and pulled it through the hole to get glue on the inside. Most of it came off before it went through, but hopefully some of it is in there.

Pulled the pin out and clamped it. Hoping for the best but I don't know if this is going to help or hurt.