/usr/share/kubuntu-netbook-default-settings/share/config/kwinrc is in kubuntu-settings-netbook 1:14.04ubuntu15.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [Style]
ButtonsOnLeft=MS
ButtonsOnRight=HA__X
CustomButtonPositions=true
[Windows]
BorderlessMaximizedWindows=true
Placement=Maximizing
|