Which direction should my dining room chandelier face and how should I install it?

The long dining lamp is placed on the dining table. Three lamp heads can be seen on the balcony and living room. The lowest lamp head is against the wall. The height difference of each lamp is about 10 cm. "The installation direction and The wall between the balcony and the living room should be installed straightly.

The round dining lamp is installed right above the dining table, and the three lamp heads can be directly seen from the balcony and living room. The height of the lamp heads refers to the height of the room.