Illuminated controls on steering wheel

On my '94 Cutlas Supreme Coupe I have controls for the stereo and climate on the wheel which are illuminated. One of the buttons does not light up. How
do I access the bulb to replace it?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.