The first picture they are close if not locked, the second picture he's come in from the wrong angle, so if they are locked, they won't be for long.
I like to see one or both of their tails curled before I call it a guaranteed lock.
The male especially, since he's pushing his junk into her trunk, he's typically going to have a curled tail from pushing. Females curled tail pretty much guarantee she's on board
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