Wiring for central locking system on Skoda Felicia

I have a 1999 1.3 Skoda Felicia hatchback and installing a 3rd party central locking system, I have two brown wires which are supposed to go to either indicator wire to give a signal. So I decided I’ll just put them straight to the indicator switch by the steering wheel but can’t get around which wires actually sends the signal to the indicators as I haven’t done something like this before, if anyone knows or has a wiring diagram for it that  would be perfect. Thank you :)