/etc/cobbler/pxe/pxeprofile_esxi.template is in cobbler-common 2.4.1-0ubuntu2.
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 | LABEL $profile_name
kernel $kernel_path
$menu_label
ipappend 2
append -c $img_path/cobbler-boot.cfg
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