To assemble {HEAD ~ the junction box} 10 composed of the above described component parts, the relay module 13, {TAIL ~ the connector module} 11, and the ECU 16 are layered one upon another sequentially 
composed of
To assemble { HEAD ~ the junction box } 10 composed of the above described component parts , the relay module 13 , { TAIL ~ the connector module } 11 , and the ECU 16 are layered one upon another sequentially
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH