How to Enter a partial Quantity to ship using load which is less than the order line quantity

How to Enter a partial Quantity to ship using load which is less than the order line quantity where order transaction in Primary UOM having weight in Ton.

When

Transportation Constant for branch have shipment Consolidation mode = Single Order Consolidation

Case : Shipment Created with Single order line having 10 Pcs equal to 60 Tn of weight (i.e. 1 PC = 6 Tn ) . Client will create load according to vehicle capacity e.g. 6to7 TN on a single Load.  As load cannot build with multiple vehicles hence  they will be creating multiple loads ( at least 6 loads according to capacity  ) for the same shipment.

In Above case at the time of selection of shipment Client need to change the Quantity he is loading on vehicle with transaction UOM that is Pcs ( because sold  item cannot be picked by ton at client business)