Haha! I am super strong.
I have strong fingers which I put down to years of yoga and pilates which works every tiny part of your body, right down to fingers and toes. Stood me in good stead for the infamous pedal box connectors.
The connectors are
very stiff, but having read lots of stories of them breaking etc, I decided to stay calm and not go at like a raging bull, lol. I walked away a couple of times, went and had a cup of tea (didn't include that in the instructions), and then went back and showed those connectors who was boss. In all honesty they weren't that bad, but my box had been on someone else's car so may be they had a bit of give. I'd previously found that video that golfhappy posted showing the connectors going together but actually the point is to get the connectors in dead straight if you can. That's easier said than done whilst kneeling with your head crooked in the footwell whilst the gravel digs into your knees, lol!!
I've heard removing the pedal box is where the problems lay as many say the grey clip breaks although the guy who used the box I now have seemed to get his off without it breaking.
I hope the fitting guide I did will be of help to others as the DTUK video is a little too simplistic and to start it's a bit of a different story when you get your head under the footwell and see all the wires. The biggest favour you can do for yourself it to first remove the flat piece of trim, that makes a huge difference.
As well as the fitting thread MK7-GTD linked to - it's also in here in the maintenance section. I added the pic guide to Vidman's very useful thread and his initial post helped me no end.
http://www.golfgtiforum.co.uk/index.php?topic=276517.msg2531794;boardseen#new
