MacBook cooler fan ripped wires

Due to a mishap during disassembly, I managed to rip the cooler fan's wires from the on-board connector. The connector itself appears intact, as do the ends of the wires. Is there a way of re-inserting the wires into the connector? It's a 2010 model A1278.

The plastic connector is probably broken given that they were, as you describe, ripped from the connector. There are very tiny detente molded into the connector and these are probably broken meaning the wire will no longer be secure. This can lead to intermittent connection problems.

Spend the few dollars and get a new fan; it’s extremely inexpensive.