[bass booster]

Why not download the database and files, upload the db to the coc server and the files to another folder(let's say /forums) then fix the shit in the config file(if mybb fix the settings file also for the domain).
After that, go to the forums domain and make it redirect to the coc website.
Note I don't know how to do anything but download the db/file and upload them lol.
I don't know sit about domains other than typing them in xD
But I'll still help if I can

[bass booster]

Yeah, but I need an exact idea of the design (How exactly I will connect the forum with the current website.)


That's the problem I'm looking to solve haha


Thanks for any help!

I'm going to call the coc website A and the forum website B.

Download the files AND database from site B.
Upload files from site B to site A server(ftp / file manager). I suggest inside a folder called forum(or close to that)
Now after that, you want to IMPORT site B database to site A.
I can help with this part I know how to do that (lol)
Now after that's all up(and running good) [test it]
redirect site B to site A (ex: siteA/forums).

Again, I can help with the exporting/importing of the database and getting the files and uploading them and helping you make sure the forum works.