editing server settings on another computer

I googled this a little bit, but couldnt find what I was looking for (probably bad wording)
But what I need is to edit server settings in the actual game (when me or my friend is connected though the actual game, instead of team viewering my server pc anytime we need to change settings).
I am pretty sure i saw somthing somewhere about using a rcon password, and i set one, yet I still have no idea what the fuck I am doing.

Bonus: also, why doesn’t wac vehicles work in the server side?

if you want to use something like teamviewver you can you the windows remote desktop or for rcon prety easy go inside your server.cfg edit rcon_password “yourpasswordhere” and connect on your server open your console type rcon_password yourpassword and for every command you want to send to the server type rcon first ex: rcon sbox_noclip 1

ps: sorry for my bad english if you need some more help pm me and i will be glad to help you