Since the weight of a banjo is primarily in the pot, we players tend to have the straps anchor the pot itself. We never put a strap on the neck near the nut.
It's usually configured like this:
...and you choose the hooks to attach to based on the ones that leave your neck at a natural angle when the pot is hanging in front of you. For example, if the neck naturally hangs low, snug the left strap farther along on the circumference of the pot hooks. Basically: Balance the circle (pot) so that the neck naturally hangs where you need it.
Our necks are much thinner than a guitar neck, so we A) Don't want to expose it to stress, and B) it's light enough to be balanced by the pot, itself.
And as a reality reference: My right strap is one hook "above" the tailpiece anchor, and my left strap snugs around the backside/heel of the neck and grabs the second (from the heel) hook from there. So to say it another way, if you're looking straight-on at my banjo with the neck up at noon, My right strap is around 6:15 (hourhand-wise), and the left is about 1 o'clock.