بَيْتًا or بَيْتاً? – Where do you add the two lines (تَنْوِين) at the end?

Today we will have a look at the writing of the تَنْوِين if you have to deal with an indefinite اِسْم in the مَنْصُوب – case. You will usually encounter both versions – like in the headline of our newsletter: on top of the Aleph (بَيْتاً) or before the Aleph (بَيْتًا)[…]