u/Due_Preference4928

I recently purchased the the Homebase 3 and added it to my system. I have a E340 doorbell camera that was in service for about a year before this. I am unable to link the homebase to the doorbell camera. Is it necessary to totally remove the doorbell camera and then add it to the homebase or is there another way of linking the two devices? Totally confused how this works. Thank you.