Haynes manual of course... if you dont have that book invest $20.
If you are talking about the screws that hold down the oem gauges then you need to unscrew them to hold down your indiglows too.
Good luck
p.s. wiring was a bitch for me.. i own a civic and the one that finally worked was the black one (a little thicker than the otehrs) on the top of the gauge cluster.. problay other ones that work too.
__________________
"A good friend will come and bail you out of jail, but
a true friend will be sitting next to you saying,
That was f#&%ing awesome."