fourth connecting means connecting {TAIL ~ the emitter} of {HEAD ~ the power} semi conductor to one of the terminal posts  
fourth connecting means connecting { TAIL ~ the emitter } of { HEAD ~ the power } semi conductor to one of the terminal posts
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH