/usr/share/syslinux/themes/ubuntu-wily/isolinux-live/isolinux.cfg is in syslinux-themes-ubuntu-wily 12.
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 | # D-I config version 2.0
include menu.cfg
default vesamenu.c32
prompt 0
timeout 50
ui gfxboot bootlogo
|