I used the grommet right under the clutch cable. I just cut from the outside diameter to the center. Pushed the wires through, then re-seated the grommet, no probs. Good Luck
Yep, that gromet is the best choice. I drilled a hole in the top just big enough to run the cables. The tighter the better. This will keep warm air from the engine bay out of the inside of the car.
Scott