Yujin dial indicator back cover with hook

Replace the flat back cover of Yujin dial indicator by the one with a hook . Thus I can mount the dial indicator to some dial indicator mount for some 3D printers for bed leveling.

For example, if I want to mount the Yujin dial indicator to MakerGear M2, I need to print this indicator mount first https://www.thingiverse.com/thing:600644
And then I need to use this hooked cover with M5 screw to combine them.