how did christopher tell the monsters where the hiding spots were

Christopher appears to have revealed the usual hiding spots to the monsters , most likely by betraying where people normally sheltered rather than through a confirmed on-screen method. The story and fan discussion suggest he may have been influenced, manipulated, or driven by something supernatural, but the show has not clearly explained the exact mechanism yet.

What’s implied

• Victor’s account points to Christopher leading the monsters to people’s hiding places.

• The idea that he “told” them is usually understood as him exposing the spots, not necessarily speaking to them face-to-face.

• Some fans think he may have been guided by voices or another entity, but that remains speculation.

Simple version

He likely gave away the hiding locations , which let the monsters find everyone during the massacre.

TL;DR

Christopher seems to have betrayed the hiding spots, but the exact way he did it has not been definitively explained in the story yet.