Placing the falseback (divider board) in the middle of the hive when installing the bees, helps the bees establish their brood nest towards the front of the top bar hive.

The steps to placing the falseback when installing bees are:
1) Place the falseback about 2/3 from the front of the hive
2) Install the bees
3) After a few days (unless it is below about 50 degrees),
remove the falseback, and move it to the back of the hive.

This sets the bees up to have their brood comb near the front of the hive.

The first few combs they draw out will be quickly filled with honey and pollen.
Then they draw out comb to put the larvae (brood) in. It is best that the brood
comb is near the front of the hive.

Brood comb, partially filled.
The brood cells are protruded slightly and

look like an eraser on the end of a pencil

Closeup of brood comb

Honeycomb, top of picture
is capped honeycomb, bottom of picture
is uncapeed honeycomb cells

Closeup of capped honeycomb,
except a few open cells at the top of the picture