This is a test of commonsense. Complete the next sentence:

How to open cable ties
Find the locking mechanism.
If you look at a ready-to-use cable tie, notice that one end tapers to a point, while the other is capped with a tiny cube. When used, the pointy end is fed through a slot in the cube to form a loop and then pulled tight.
The cube is the locking mechanism that keeps the tie from worming back out through the slot, so look for that. Bend the tie's loose end back.