no need for a flathead. just reach behind and squeeze the clips on the back together. should make it pop out. no worries bout scratches that way. its how i did it from memory. if you want confirmation im gonna be pulling my dash out on either monday or tues. can tell u for sure then.
with the light, if it isnt obviously slotted in then just cut the wire behind it. no harm to ur alarm and easily reconnected later