You're right, there is an Add to Contacts drop-down, but not an Add To Buddy List (I've seen that as a modification). You can see this by just hitting View Default on your template or hit View History and Compare your template to Jelsofts.
HTML Code:
<if condition="$post['userid'] AND $show['member']">
<tr><td class="vbmenu_option"><a href="profile.php?$session[sessionurl]do=addlist&userlist=buddy&u=$post[userid]"><phrase 1="$post[username]">$vbphrase[add_x_to_contacts]</phrase></a></td></tr>
</if>
That is from 3.8. Your's may be different depending on the version. Look it up as I showed in my paragraph above.