Whereas I have no truck with overpriced cables, introducing extra connections doesn't make a lot of sense given the small difference in cost between the adaptor and a complete cable with a right angled end. I'd replace the whole cable with one of an appropriate length from That Cable personally. Not from a sound/quality perspective but simply fewer connections = greater reliability.
(lets not get into the logic of introducing an 'un-blessed' element to a 'blessed' cable)