Sorry for the extra questions – but how wide are these adverts? Just mindful on smaller desktop screens their may not be enough room, and if the Ads are being served remotely they are not the most responsive of things…. let me know.
In the meantime try adding them to the Top Bar Widget area using the Custom HTML widget, one for each of the advert scripts.
The first widget will auto align left and the second auto align right. We can then look at some CSS to merge this with the header….. at least thats the plan