Cabrio hood rear tension cable

Can anyone tell me if it's possible to replace the rear tension cable without taking the roof apart. Mine has snapped.

I already need to replace the header seal (2 splits). So I'll replace the front 2 seals under the release handles, I've had some leaking there.

I'm trying to avoid the cost of a complete new roof but I suppose if I have to.

Thanks.

yeah mine snapped while putting new roof on finished putting it on ordered another and then fitted it after pretty straight forward and im a dufus with things like that    

OK, thanks, I'll give it a go.

yea 10mm ratchet spanner, cup of tea and a lot of patience