Where is the thread for the LED rocker switch swap?

A couple years ago someone posted how to swap the bulb to a LED on a rocker switch. I did a search and can't find it. Anyone know where it is? Getting sick of replacing battery switches every year. Thanks

Found this, but the link in this link doesn't work.
http://www.clubsearay.com/index.php?threads/340da-control-panel-battery-rocker-switches.32973/

I know the member MasterFab did his on his boat, if you google SeaRay restoration blog he did a great write up on the swap of the ones on his 340.

Ed