Welcome to the Q&A Forum

Hi, Tawny is right. If you want to pass on any existing authority to a new domain/url, then you want to be using 301 redirects to do it. Either doing them en masse (e.g. all http: to https:) or individually if required, and you should get somewhere around 90% of the original SEO benefit (which is better than nothing). Plus it also avoids users trying to visit via previous links ending up on a 404 page, which is pretty bad for the user experience.

Sometimes the http to https redirect can't be avoided. It depends on where you host your website. Check your code and make sure every reference to /contact/ ends with a trailing slash. That should do the job.