rigging
If a System, Module, Ability, or Pilot Equipment has the Rigging Trait, this allows it to perform the 'Load' Action letting it pick up and carry Scrap and salvage. It also allows use of the 'Mount/Dismount' Action allowing you to attach a System or Module onto a Mech.
Trait
Salvage Union Workshop ManualPage 145
If a System, Module, Ability, or Pilot Equipment has the Rigging Trait, this allows it to perform the 'Load' Action letting it pick up and carry Scrap and salvage. It also allows use of the 'Mount/Dismount' Action allowing you to attach a System or Module onto a Mech.
Source: Salvage Union Workshop Manual, p. 145