how do you actually use the new locations? zero documentation on it, whatsoever.

Me and a few friends have been trying to setup a BO2 zombies match. so far only 2/3 of us have managed, me and the other friend has tried the following:

1. reinstalled the game
2. closed steam, allowed 3074 (udp) via firewall and allowed anything pluto related via firewall
3. tried radmin on both matches starting on his and my side.
4. he is unable to port forward or access router settings.
5. unfollowed and followed eachother

the issue in question is either Client Field Mismatch, Unable to Join game or the checkerboard issue. if i try to join via his radmin ip i just get Loading Game Session with no avail.

we are a bit stuck and i have even shared my exes incase they are corrupted on his side.