You must already have a Panel instance. Read more at License Management.
Go to your WISP instance admin Panel, select Migrator, and fill in all the required details. Your Pterodactyl Panel and database must be running for WISP to connect for the migration.
Make sure all your Nodes and Locations have descriptions on your Pterodactyl panel. Empty descriptions might cause errors. In addition, your API Key must have all permissions to migrate everything.
If the WISP installer detects Pterodactyl, it will ask should you want to migrate the servers to WISP. You'll want to do this for the Nodes you want to migrate to WISP. The installer would automatically stop the Pterodactyl daemon from restarting. Click here for more info on Installing WISP