Assuming it is the injector spur, you should be able to repair any damage to the wires quite easily. You may have to peel back some of the looms wrapping to get enough slack to play with. Use solder to repair the conductor (if required) and heat shrink or self-amalgamating tape to repair the insulation. Once repaired it would be wise to fit a foam pad like the original link you saw to this fault ( http://www.xt660.com/showthread.php?t=23331).

I reckon (if its your first time) it takes about half an hour to remove the tank and about the same to put it back. You do not need to necessarily drain the tank into a Jerry can as the pipe union on the pump body is self-sealing; the only issue is the weight. If you've got half a tank of fuel or less you will be able to man-handle it. With a full tank it's still possible, but 23 litres of fuel weighs about 20Kg!

Here's a good thread to guide you through removing and refitting the tank...

http://www.xt660.com/showthread.php?t=8876

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