It mostly doesn’t matter where on the right side of the balancing pole you place the sticker, but the outside person may take your placement into account when judging if it looks balanced or not.

The outside person will have to decide for themselves how heavy they think the alien is.

You have to think spatially and ignore the wire in the foreground.

Placing an art sticker is optional. If you don’t, the reflexive triggered ability doesn’t trigger. You won’t ask an outside person to decide if your clearly unbalanced pole looks balanced.