Help I.D. this dash part

[tiggershark]

Found it under the table where my dash parts are stacked. getting ready to reinstall dash. It's on page 2, the very last post.

https://nastyz28.com/threads/help-i-d-dash-parts-please.336889/

[firebirdparts]

That "prism" allows the wiper/washer emblem to light up a little bit.  it installs at the edge of the instrument cluster and there's a little slot there in the cluster housing where it can pick up a little light.

This is a little bit of an explanation:
https://www.firebirdcentral.com/1970_1981_Dash_Gauge_Bezel_Light_Prism_NEW_p/das-2003p.htm

They are really hard to install/uninstall without breaking at the push pin

[firebirdparts]

here's a picture showing the hole:

[tiggershark]

Thank you very much!