Where the cables feed into the motor you need to remove the upper casing which is held on with 2 x 10mm bolts located under the hood to the front.
With the cover plate out of the way you will see a stainless securing plate which holds the cables in place. Remove that. Then the circlips which hold the cables onto the linkages (refit them to the engine side until the new cables comes in). When refitting you may well find the need to use the old screw caps on the new cables as they don't normally come with new cables!!
From memory the cables needed are 33C
Hope that helps
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