Citroen, switch replacement in Zevulun

Citroen, switch replacement in Zevulun.
If the ignition switch fails, the engine cannot be started. The switch position varies from car to car, but the general procedure is approximately as follows: disconnect the battery, disconnect the block with wires, remove the fasteners that attach the device to the body, dismantle the switch. Installation of a new switch is carried out in the reverse order.