8" display - what's the correct position for the connector's black clip?

Hi,
what’s the expected position of the black plastic clip after that the ribbon cable has been placed in the connector?
Should it be pushed all the way back? The little hooks of the clip are very very thin and weak and I fear they might break if I try to push it more, given the resistance brought by the thickness of the cable.
At the moment I have pushed the clip back but not strongly enough to have it entirely in its closed position. Because of that, the cable is subject to movements and must be repositioned often.

Thanks for your help,
Daniele

They slide forward WITH the ribbon cable.

This requires very little force… e.g. less than what would break a flat toothpick.