/usr/share/GConf/gsettings/mousetweaks.convert is in mousetweaks 3.12.0-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | [org.gnome.mousetweaks]
click-type-window-style = /desktop/gnome/accessibility/mouse/button_layout
|