Drilled into Wall Cable: Repairing with Terminal Block, Insulation, Roofing Sealant & Plastering

I warmly welcome.
I'm not an electrician but I like to tinker so I started to install the storage box at home.
Unfortunately, I drilled perfectly into the cable.
I want to fix it according to electrical and building art.
I dusted everything off the cable ready to connect.
Picture attached.
When I connect it, I want to size the hole that I want to paint later so that there is no trace

I have a plan like this:
1. Connect the cables with a terminal block
2. I insulate well around thick insulating tape
3. Pour / fill the entire hole and cables with roofing sealant
4. Plastering to obtain a smooth wall surface
5. I paint

Will the repair done in this way be correct and let you forget it too bad luck?
I am asking for advice and suggestions.

Medium plan, there should be access to such a place.
Insert the box, connector cables with cubes or scales, blind the box with the lid and possibly slightly plaster.

The can falls off. First of all, I don't want to forge a larger hole, secondly, there is no trace for animal reasons
I have cats, two of them will have a lair in this storage room, a can or whatever will cause them to gouge until they open and get to the wires.
I connected the cables, turned on the fuse + I replaced the fuse at the meter automatic popped out and at the meter the fuse burned.
Electricity is all working.
I just don't know how to secure the cables and seal the hole to make it happen (I understand that it is against electrical art) but it is safe that you will never have to rummage here again.

Buddy, for this purpose repair kits are available for purchase in electrical wholesalers + instructions for use. Topic featured in the forum several times, look for.
I close.