Switching hassio on pi3 from wifi to ethernet

Lots of confusing posts on this topic so looking for the definitive answer please. I initially installed hassio using a wifi connection but I now have a ethernet connection available. I’m looking for the easiest (safest !) way to switch while leaving everything else identical i.e ip address, dns, etc.
Thank you.

I did this recently, due to all my home automation gadgets killing the wifi.

How are you assigning the IP address at the moment? DHCP?

In my case, I assign static IP addresses to hardware (MAC) addresses - so I just changed the IP address that was assigned to the wifi MAC address, over to the ethernet MAC address… and that was it.

My ip is fixed on hassio