distance si-sledge-front to silicon-Z-center = 23 cm

-> silicon sledge front 35 cm inside from front of TPC-support at a beam position 58 cm from front of TPC-support

CCU119 = 0x77

• position 7 = I2C16 = SiLC12 -> front X
• position 1 = I2C17 = SiLC11 -> front Z

CCU123 = 0x7b

• position 7 = I2C16 = SiLC01 -> back Z
• position 1 = I2C17 = SiLC02 -> back X