Fairly easy. Unclip the hbrake lever shroud , underneath the lever from the front loosen the adjusting bolt, 12 or 13mm I think. Unless your arms are too short you can reach under the car and unclip the cables from the bracket.No 10 in pic 2 from gaza 82. Clip 9 just holds the two cables together. Unhook cables from clips on body and from operating levers on brake. Fit the new cable in reverse order. Main difficulty is not having it jacked up high enough to get both hands on the cables/ brackets, and having to do it by feel. I would fit both sides unless you know the other one is new , saves you having to do it all again when it snows and the cable freezes your handbrake on.