Alright dude, it will tell you exactly what to do in the instructions that came with the kit, but I will make it easy for you, once you get your head around it, it's really easy to do!!
Yes you have to make a hole in the back of the head light covers, take them off first, then go inside and make the holes, I used a soldering iron to burn a hole in the back, then filed them down to make a good fit, but you can use what ever you want, as long as you make a decent hole, the size of the hole should be around 25mm, but this doesn't have to be exact, as those blue rubber gromets that are already attached to the kit a quite flexible, once you have made the holes, feed the wires through from the inside of the cover, then push part of the gromet through to make it water tight, you then have the hid bulb and 2 wires with flat connecters on the ends, 1 is red and 1 is black, you plug these straight in to the plug that was connected to your original halogen bulb, the colour wires on this are red and brown, so you go red to red and black to brown, then you fit your hid bulb in exactly the same way that the halogen was fitted, but because your hid bulb has 2 wires coming straight out of it, you have to make sure you give yourself plenty of wire, as the metal clip that holds the bulb in place, has to go over the wires, so you need enough to feed under the clip, you will see what I mean when you do it, it's self explanetry, just pull the wires through the gromet to give your self as much as you need, once you have the bulb fixed, pull any slack wires back through the gromet and then fix your light cover with the clips, then you just follow the diagram thats in the instructions and connect the starters and ballasts all up, you cant go wrong as the plugs only fit the right way round, then just find the best place to hide them with the double sided sticky pads and your there!!!!
Here are some pic's of mine, I didn't take a pic without the lights on in day light, as they look exactly the same as yours, it's just the bulb that you are replacing, the pic with the lights on, they do not look like this in real life, the glare is from the camera, you dont get a glare from the hids!!!
Oh and one last thing, dont forget to put the ignition on to test them out!! lol!!
Drivers side back cover
Ballasts hidden down the inside by the fuel pump
Passenger side back cover
Ballasts hidden down the side in front of the wind screen washer bottle
Here they are
Hope this makes things easy for you now, it really is simple, just take your time and you will be fine