Tab on headlamp inner lens

[toolmonkey]

This may sound like a stupid question but what is that little tab sticking out of the inner lens of regular (non projector) 996 headlamps?

 

Mine , as seems to be common, have  yellowing/burn marks on the top of  the  inner lens..(maybe somebody stuck an overated bulb sometime)...

So, I was pondering of the possibilities of attempting to "open" the assembly and modifying it with projector type units. That little tab thingy kind of puzzled me. 

 

If I mess it up, guess I'll just buy new "modern" units.

[JFP in PA]

Photo, year and model?

[toolmonkey]

Guess I got my answer today... Just posting in case another like me wonders about those tabs.

 

btw it's a 2000 996 C2 regular halogen headlamps

 

It's a headlight  height alignment/level tab- it's got little graduated lines (lines that indicate height by tab moving in/out)

 

Got tired of staring at the yellowish/burnt inner lenses so decided to do something about it. Being the cheapskate that I am and not willing to splurge thousands on

new headlamp units (not yet anyways);decided to attempt the "projector install MOD. If it goes wrong I guess I will buy new complete headlamps.

 

Got me a kit of xenon projectors, baked my OEM headlamps, split them open (one done so far with no mishaps)....except somebody was not thrilled about a headlamp in the oven!

 

This is when my failing vision finally realized the meaning of the tab and the adjustment lock knob within the unit.

 

 

 

 

rem: as I pulled the headlamps off I also got an answer as to the burnt lenses....seems somebody ran aftermarket xenon bulbs in there....and left the ballasts behind after returning it to stock.