Before continuing, make absolutely sure that the strips and hubs are correctly oriented.

Double-check that the Top piece keyholes have the narrow bit facing up, and the circular bit facing down.

Seriously, be careful. This glue is permanent.

Mixing small batches at a time, epoxy the segments into the hubs. They should bottom out into their slots.

Ventilate the room with fresh air, and allow the epoxy to fully cure before continuing.