Switching from one channel manager to OwnerRez Question

First I disconnect from my current channel manager. But I don’t think I turn on my new channel manager API yet. I need to PULL the Airbnb listings and get them into OwnerRez first. I understand once connect OwnerRez pushes out to all channels. But I need them to be pushed the other direction...just once. In order to setup my account. Do I use that Bridge tool they suggest? To pull all listings, calendar, and photos? Or in other words PUSH my listings from Airbnb to OwnerRez. Or do I just change my channel manager and connect through API and like magic all those Airbnb listings will be imported.

Actually, we have a special tool that can import the listing data from any Airbnb or VRBO listing, without having to log in to the channel:

https://www.ownerrez.com/support/articles/listing-content-import