you can toward the spark plug, damaging these wires can cause costs.
once you have the plug wires removed and labelled in the correct order it is time to get you plug socket wrench and extension. look inside the plugs housing and you will see exactly where you need to slot the extension down into. there may be some foam or rubber on the inside end this is to hold onto the spark plug while you remove it.
set the wrench counter clockwise position it in to the gap and before turning the wrench make sure it is sat over the end of the plug as far down as it can go 