Found the other end of the sensor. It is attached to the diagnostic plug of the ECU....but where does the sheared end go to??

How would one replace this, being that is part of the ECU it seems. It does not look like it would disconnect.

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Norm K.
'97 E420 Sport
'06 E350 Sedan
'67 Mustang Coupe
'70 F-250
'15 VW Jetta