Avatarika
अस्याधुना सत्यस्य ब्रह्मणः संस्थानविशेषे उपासनमुच्य-ते—
In plain words
Now he moves on to show how to meditate on this same Brahman, Truth, in one specific form it takes—
Close to the Sanskrit
Now, the meditation upon this Brahman, Truth, in a particular configuration, is declared—