Once everything is configured, the fuse box can be tested. For this, go where it is placed and follow these steps:
Make sure to have at least 4 fuses and 1 blue wire in the inventory.
Enter inside the device trigger, open the menu and press the Fuse object.
Press the button Use, select the amount to use with the buttons + and - (it can be one by one, two, any amount from the available in the inventory). You can press also X to close the amount window.
Press Use again. The fuses are activated and the message configure is shown.
Open the inventory again, select the blue wire and use it.
As you can see, every message is shown according to the object used. Like this, all the elements needed are placed and the door is unlocked. Also, in this case, when the door is unlocked, the map icon in the minimap changes.