Hi Gordon. Thanks for your reply.
Trust me I'm spending way too much time with my friend Search

You can ask her

I should be more specific with my queue. Sorry for that.

I'm well aware about those connectors mentioned by "itsblue" in the other post. The problem only is the acc terminal under the right cover goes hot when the key is on ON position. But not on ACC position which we are using when we would like to use the audio without discharging the battery with something else.
I have used the multimeter method yesterday and found wire serving the power to radio in both positions. ( ON/ACC ) which is exactly what I'm looking for.
I will set everything later today and will try to upload few pics for future use if someone will try to achieve something similar .
( please note I'm not sure if this method is correct by fuses\ power drain point of view but I'm sure some guys with more knowledge will advise shortly )
Cheers and ride safe. Jiri