They are fitted so they protrude out of the open end for bar ends but the SOHC grips are closed ends, as in no bar ends fitted. If you fit them in the open end instead on the SOHC grips they’d be trapped by the switchgear or stop just before they were fully slid on. So do that but don’t fit the switchgear or leave the switchgear unscrewed. That way you can do the same as the video but slide the tie wraps out without snagging on the switchgear.