Here is my output:
Screen 0: minimum 320 x 200, current 3360 x 1050, maximum 8192 x 8192
VGA1 connected 1680x1050+0+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.0*+
1680x945 60.0
1400x1050 74.9 60.0
1600x900 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 74.9 59.8
1152x864 75.0
1280x768 74.9 59.9
1024x768 75.1 70.1 60.0
1024x576 60.0
800x600 72.2 75.0 60.3 56.2
848x480 60.0
640x480 72.8 75.0 60.0
720x400 70.1
HDMI1 connected 1680x1050+1680+0 (normal left inverted right x axis y axis) 474mm x 296mm
1680x1050 60.0*+
1680x945 60.0
1400x1050 74.9 59.9
1600x900 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1366x768 60.0
1360x768 60.0
1280x800 74.9 59.9
1152x864 75.0
1280x768 74.9 60.0
1024x768 75.1 70.1 60.0
1024x576 60.0
800x600 72.2 75.0 60.3 56.2
848x480 60.0
640x480 72.8 75.0 60.0
720x400 70.1
DP1 disconnected (normal left inverted right x axis y axis)
Is there a way to change which monitor is 0,0? So from my output, I want the primary display of the windows guest to be on HDMI1 and extend the other display onto VGA1. Is this possible? I tried changing the topology with xrandr but did not get anywhere. Is it possible to set the x axis as a negative number?