/usr/share/fcitx/inputmethod/mozc.conf is in fcitx-mozc 2.20.2673.102+dfsg-2.
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 | [InputMethod]
UniqueName=mozc
Name=Mozc
IconName=/usr/share/fcitx/mozc/icon/mozc.png
Priority=1
LangCode=ja
Parent=fcitx-mozc
|