The shieldside weapons are standalone verisons of the normal melee weapons but with the unarmed animations so you block with the shield.
Currently there is only one shield: the Trash Can Lid (MORE ARE UPCOMING)
Install with any mod manager-
There is an optional Crafting Workbench Patch to craft the Shield and the Shieldside weapons, otherwise to use the items:
Use console
help shieldside 4 (for the shieldside weapons)
or
help shield 4 (for the shields)
then
player.additem id(id is the result of the help command next to the desired item's name)