Hi new member in uk
 

I own a 2012 cbr600f and want to fit a usb charger but not sure how to wire it in or if it's got any auxiliary wires please help

Mate should be really easy. I have one on my f4i. Just run it off the battery. I'd recommend you get something like this....
https://www.ebay.co.uk/itm/Universal...Re44:rk:2:pf:0
There are 2 options with this thing. One is connect directly to battery and run it to the front of the bike near the handlbars. The USB charger then can be mounted on handlebar and could be connected to the wires coming off battery when you need it. You should always disconnect when you dismount, but in my experience you'd never leave your phone of the bike anyway...
The 2nd safer option is to tap into the ignition circuit so that when you turn the ignition off, this doesn't then still draw power, but for that you'd need to see what's the easiest point where you can splice into the ignition. Check wiring dia for a suitable option preferably near the batter