KM account lights, Citroen Ax 1992

Greetings to all, I need help, I don't know how to disconnect the cable has kilometers from the board instruments, need to take it out to support the dashboard lights,
1- You have to disconnect it behind the board and how is it done, ??
2- Do you have to disconnect it from the gearbox?
I disassemble everything well until I could not take out the Istruration Board because I could not disconnect the cable Count Kilometers you get with difficulty to touch it and I did not insist because I do not want to break something since it is all of plastic,
thanks to who could help me Gaudenzio