RV Credenza

I have seen many posting of members taking out their dinette and replacing with a credenza. We are planning on doing this but have one question. Can someone tell me, preferably take pictures of how the table is attached to the credenza. I see the tabletop slides out to make the table longer. What kind of support is installed at the credenza to hold the table up and to move out smoothly? I hope I am being clear. I am going to make the credenza myself so this is the only question I have. Thanks everyone for your feedback. It will be greatly appreciated. :)