Which additional authorization list item can be used to provide additional leverage when using the winch?

That is a difficult syntax to answer. But the main way to increase leverage, or pulling power with a winch is the use of a block-and-tackle and luff. The more sheaves on the pulley the more pulling power. It's exponential. A two cable luff line has twice the power, but a 3-line luff has 6X the lifting power with the same amount of torque from drum. (Using crane and winch parts names interchangeably) A drum is the drive gear with roll of cable