na, ur not gonna break it. i dont know exactly about ur cluster, but there might be a white cover in the back.
u'll have to take that off.
i dont know if your car has a whole chip board in the back or if all the guages have a different chip board.
just go ahead and unscrew it, u'r not gonna messup and thing unless you take off the needles, just be very careful w/ them.

u'll see about 6 or more tall lights. well the little bulbs are just at teh top, but they have a long rubbery bottom. just swap ur D4 light w/ D1.