I have bought xenons for my skoda octavia but I am unable to fit them due to the bracket that holds the light bulb is not transferable to the xenons.

Anyone any ideas please?

Your only legal option would be to purchase headlights that were designed to take xenons from factory. You will also need self levellers and headlight washers.

The law on after market xenons is changing and if they're not properly fitted with levellers and headlight washers, The vehicle may not pass an mot.

In answer to your original question.

If you remove the black plastic bulb plug from the metal fitting, you should be able to feed the hid wires through the metal clip bit and fit the bulb into the headlight.

I know some people have had issues, but I've had a london colour slim HID kit fitted to my MY2011 Octavia with no issues at all, for 2 years now.