I have a 60mm greddy boost gauge that i am trying to install. I can't figure where to enter the engine compartment from the inside of my car. My car is an automatic so there is no yellow grommet to punch a whole from. and if there was the only holes that i can find are all full with power cables running through them for my stereo. has anyone run into this problem..please give me advice, i really wanted to install the gauge and boost control myself..