Sidebar Buttons
It's relatively easy to add buttons to the LCARS 'sidebar'. Here's how: in your HTML page, locate the DIV with the class name "panel-3" and insert the following code after (shown in red)...
<div class="panel-3">03<span class="hop">-111968</span></div>
<div class="sidebar-buttons">
<a href="url">button 01</a>
<a href="url">button 02</a>
</div>
<div class="panel-4">04<span class="hop">-041969</span></div>
Result
NOTE: You can insert as many buttons as you like, but do so only between DIVs "panel-3" and "panel-4" for best results. Also try and limit the amount of text for each button to no more than approximately 8 characters as they may not all display when viewing on smart phones.