If you want to migrate your current website to the WordPress CMS and preserve your SEO links, then we suggest you install Redirection or Simple 301 Redirects plugin to your new WordPress site in advance. (If you use other redirection plugins, please, contact us.). In this way, all your Existing website links will redirect to the ones on your New CMS.
Install ‘Redirection’ plugin to your new WordPress website:
Or ‘Simple 301 Redirects’
After having installed one of these plugins on your new WordPress website, return to your Migration Wizard and choose “301 Redirects from old URLs to new URLs” option and proceed with the migration.