JUWEL Aquarium Led mount

I got a JUWEL Aquarium with the lighting system.
The fluorescent system died.
I wanted to replace it with LED lighting.
This is a connector to the Juwel lighting system that enables us to mount other lighting modules in it.
This item was used with my (https://www.thingiverse.com/thing:1951332)

It can be mounted in two ways :
mounting arm up
or mounting arm down.

The drill hall is for M4 screw

Thnaks Amnon