This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The historical origin of 臱 is uncertain. It visually contains 自, 穴, and 方, but the exact development is unclear.
Since the meaning is unclear, focus on the shape: 自 (self) over 穴 (hole) over 方 (direction). Picture a self peering into a hole to find a direction, but remember this is just a shape memory aid.
For ベン, imagine a bent self peering into a hole: bent -> ベン, and the self is bent over the hole.
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