What you're looking for may be possible with CSS, but it'd be difficult to shift it all the way over there. What I'd recommend is:
* In the SCLogin module, disable the showing of social network login buttons
* Create a new custom HTML module
** Place it in the top right corner of your page wherever you want it
** In the Custom HTML area, add:
<a class="sc_fblogin" href="javascript:void(0)" onclick="jfbc.login.provider('facebook');">
<img src="/media/sourcecoast/images/provider/facebook/icon_label.png" alt="Identificarse con Facebook" title="Identificarse con Facebook">
</a>
That's the same code the SCLogin module uses.
With that, you have a lot of flexibility to move the button around, change the image, and style it however you want.
I hope that helps,
Alex