Thru cPanel you'd use the file manager to find the file you want to edit then click edit and place the links where you want them. An example link might be:
Code:
<a href="http://forums.cpanel.net/showthread.php?t=61318">adding links - cPanel Forums</a>
Better to get a good FTP client like CuteFTP Pro which has a built in editor to work with. With that login to the account find the file and right click, choose edit. Place link where you like.