It might be hidden. It could be on the sides of the trunk, and if it is, there is usually a piece of fitted carpet covering the front. It shouldn't be that hard to find.
<span style='font-size:8pt;line-height:100%'><span style='color:blue'>1998 BMW 323is Coupe, Black
18" M3 Hyper Silver Rims
2 12" Rockford Fosgate Subs; Sealed
1.0 Farad Capacitor
800 Watt 2-Way Rockford Fosgate Amplifier</span></span>