Diagnostic connector shorting link?

[gilmour182]

The Diagnostic connector under the ashtray on my 182 has a shorting link built into the blanking cap of the connector.
..So with the blanking cap fitted 2 pins get shorted out.

What is this shorting link for?

 

[bmh.01]

Pictures please.

 

[gilmour182]

Will try to get a pic in the morning, But as described. The shorting link is bonded onto the inside of the rubber protective cap that fits over the diagnostic plug. When the caps is fitted over the plug it shorts 2 pins together.????? Only noticed cos mine was left off after the last service.

 

[gilmour182]

Link is shown inside green circle. Would just like to know what its for as i done around 5k miles with it not connected.

 

[gilmour182]

No one out there know?