Step-by-Step Guide for Anti-Interference Filter Installation in Punto 2 Car

Hi to all
At the beginning I would like to point out that I am green, so I am asking for a blatant answer.
In my car (punto 2), you can hear the rotation of the car in the speakers while driving and stationary, which is very irritating. I found a solution on the internet to install an anti-interference filter.
And now I just need instructions where to connect it exactly, whether directly into the cables connected to the radio, or somewhere else, in addition, where is which side (in and out marks on the filter), I also need to know if twisting the cables and wrapping it with insulating tape is enough or rather use cubes, the best would be a step by step instruction with pictures ?
Thanks in advance for the answers ?

And there is no connection diagram? It should be when buying a new one.

There is only a description in words, it does not help much, I attach a photo of the description and photos of the filter itself, as you can see there is a fuse (probably, as I wrote earlier - I'm green , hence I think it could be connected directly behind the radio

You install in place of radio power supply, i.e. you are looking for which plus (red) and minus (black-mass) you unfasten and plug in the red filter on the red black on black on the battery side and similarly on the radio side. on the battery side, the wires marked in a to the radio out.

So in total, as I thought, now only find which black is black is the mass ? (there are a few black wires with different colors)
Thanks a lot, I think the topic to be closed

color is color look at the radio and there mount / disconnect full color together in the cube with red power, turn and solder insulate.