to bear on the shoulders
掮 centers on carrying a load on the shoulders, specifically bearing something heavy by supporting it with the shoulder.
掮 combines 扌 (hand) with 肩 (shoulder), suggesting the action of using the hand and shoulder together to carry something. The exact historical development is uncertain, but the component relationship is clear.
The hand radical 扌 beside 肩 (shoulder) shows a hand helping the shoulder bear a load: 掮 means to carry on the shoulders.
For ケン, picture Ken shouldering a heavy bag: Ken -> ケン, and he bears the weight on his shoulder.