I have no pos_x sett but I need to scale to full screen.
This is work when:

video_aspect = 1.777;
video_screen = 2;
video_mode = 6;
panel.scale_x = (screen_size.x) / 2150;
panel.scale_y = (screen_size.y) / 1470;

When I have 1920/1080 bmap panel but it is not good when I change resolution of the screen to not to be 6.