SC middle moon roof drains - how to

I think mine are blocked, well more specifically the rears maybe blocked as I'm getting water dripping at rge rear of the middle moon roof, if the cover is pushed bak for some time that has a wet patch on the rear left side, so, how do you get to it ?? used a torch to look down the gap when the roof is open but is like looking into the abyss

Strimmer plastic for petrol strimmers works fine.

Thanks Clive, do I just feed it down the roof channel, do you know where the rears drain out underneath

You should see black udder type things underneath just jiggle the strimmer stuff down until it pops out with a load of gunge and a few drops of water.