Retrieving the dynamo cable from inside the front fork

[This Wreckage]

I have a Gazelle Esprit bike in which the dynamo is connected at the front axle via a plug; the two wires are nicely hidden inside the front fork up to the lights. However, these wires keep coming away from the plug. When I attempted to refit them, I accidentally pulled them through their hole inside the hollow front fork (see photo). Can anyone suggest a means to retrieve them?

 

[Yellow Saddle]

Pull it out completely.
Now take a bit of sewing cotton (the really thin stuff, and put a length of it in the top hole. Now, from the bottom hole, suck into the hole with your Henry Hoover Suckamobile with some little nozzle that you've improvised. Feed the cotton through with the suction. Now cut the cotton off at the top and carefuilly tape it to the end of the dyno cable. Make it as streamlined as possible and gently pull it through.
Now drink a beer and go for a ride.