On my SRT6 the cable comes around to a black distribution box which is directly in front of the battery, mounted on the suspension strut. Hinged cover. Inside you will see a bus bar with securing bolts and nuts. Battery cable goes one end. Note fuses inside. Battery cable possibly feeds else where, but this distribution box might get you the power you want.
ps, my SRT6 is RH drive, but LH should mirror this?
Peter