10-pin 1: FR+ (output) 2: FL+ (output) 3: ACC 4: +B 5: FR- (output) 6: FL- (output) 7: GND 8: None 9: AMP 10: None 12-pin 1: FL+ (input) 2: FR+ (input) 3: RL+ (input) 4: RR+ (output) 5: RL+ (output) 6: FL- (input) 7: FR- (input) 8: RL- (input) 9: RR+ (input) 10: RR- (input) 11: RR- (output) 12: RL- (output)