Hey Rob. I’m glad you were able to post a topic!
My first thought, which will be many users’ thought, is the bonding process cannot start until both your rabbits are neutered. You think typically about neutering/spaying to prevent pregnancy, but it’s also to make the rabbits get along. Without neutering/spaying in all involved parties, territorial hormones will get in the way, causing some fighting.
Once both are neutered, then you’ll want to start bonding slowly. It seems, since fighting is the go-to response for these lads, that visual introduction would be best, in addition to swapping territories for a bit. I have no experience with bonding, so others can chime in, but the highlight of this reply is mainly, both rabbits should be neutered.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.