The key is disposed on {HEAD ~ the recessed portion}, and the connecting part is connected to {TAIL ~ the body} and is electrically connected with the motherboard 
The key is disposed on { HEAD ~ the recessed portion } , and the connecting part is connected to { TAIL ~ the body } and is electrically connected with the motherboard
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH