If you send BTC from address A, then you will get tokens on address A. For Bitcoin, it does not matter which address you put into the dashboard (although, obviously it is recommended to input the same one).
Since you mentioned that we no need to put same address in dashboard then we can send BTC even without opening an account in
https://nvo.io/? site right?
Anyway, I have put in the same BTC address in my dashboard and sent BTC from the same address.
Yes, in the case of bitcoin only, but it is better if you register as the team can help you if there is any issue.