If you fiddle with the cut out and/or the fuse in it be careful that the insulation does not crumble way where indicated and create a short between Live and Neutral in the supply cable.
The upstream fuse will be at least 200 Amps and possible 400 Amps.
If 200 Amps then the arc burning at the Live to Neutral will be creating about 50 kW of heat.
This could result in the supply cable continuing to burn down into the ground.
Damage to the house could be extensive
https://www.esfrs.org/black-museum/all-the-black-museum-cases/faulty-cut-out-fuse/
The upstream fuse will be at least 200 Amps and possible 400 Amps.
If 200 Amps then the arc burning at the Live to Neutral will be creating about 50 kW of heat.
This could result in the supply cable continuing to burn down into the ground.
Damage to the house could be extensive
https://www.esfrs.org/black-museum/all-the-black-museum-cases/faulty-cut-out-fuse/