You need a 'sonda'. This is a stiffish nylon flexible rod with metal ends which screw on and off. You can get one in any electrical merchants, or in OBI/Brico type places. (It will look like a white circle,(coil) probably 40cm in diameter, and come in a plastic bag). Can be 5,10,or 15 (or more) meters long, cost about €10 max. You push this thru the tubes, and pull the cables after it. The stuff to use for lubrication is talcum powder - be liberal with it, buy it on the perfumery counter.
You need a 'sonda'. This is a stiffish nylon flexible rod with metal ends which screw on and off. You can get one in any electrical merchants, or in OBI/Brico type places. (It will look like a white circle,(coil) probably 40cm in diameter, and come in a plastic bag). Can be 5,10,or 15 (or more) meters long, cost about €10 max. You push this thru the tubes, and pull the cables after it. The stuff to use for lubrication is talcum powder - be liberal with it, buy it on the perfumery counter.