Replace multiple clips with timecode sync

I have a 30 second edit I put together from film rushes. I was given a 45 minute file of the whole film reel to make this edit. Now the edit is locked, the clips in the final edit have been scanned properly. I have been given back about 20 short clips which make up the edit.

I want to swap these clips into the edit however I can't figure out how to do this automatically. In the past I've relinked or replaced one file with one other, however I can't see how to replace 1 long file with 20 shorter files.

I can manually line up the clips and see their timecodes match however this is a really time consuming process and more prone to error than if I could do it automatically.

How can I swap in these 20 shorter clips using timecode sync automatically?

Thanks!