In min dhikrā ḥabībin wa-manzilin, dhikrā means remembrance. Ḥabīb and manzil are the two objects of that remembrance: a person and the place associated with that person.
Both nouns are indefinite. Rather than introducing a named character, the poet evokes a personal experience through general nouns, making the feeling accessible beyond its original occasion.
The construction does not suggest two unrelated griefs. The beloved and the dwelling are two aspects of one remembered loss.