Ground the Radio Where?

[TMein@aol.com]

I have significant engine noise when the radio is turned on. System is a
clarion cd in the dash, powering 4" boston acoustics seps in the dash. Preamp
outputs go to an equalizer that splits out with two sets of RCA cables. THese
route along the floor to a 4 channel Rockford Fosgate; this is split 40 W to
rear door boston ac 5" seps and a Bazooka unpowered sub. The amp is connected
(power) directly to the battery under the rear seat; the ground is on a bolt
where the 3rd rear seat would be.

My ground for the radio itself is a screw on the center console mounting
bracket. Is this a good place? I can't find another location? any
suggestions?

If you all are interested, this system is fairly cost effective and plenty
powerful:
Cd player (12x2 watts): $300
Eq w/three outputs: 150
4" Boston seps (nifty surface mt tweets) 150
5 1/4"Boston plates (took them apart and placed in doors) 180
Rockford 4x40w amp: 250
Bazooka 6 1/2": 100
total: $1030