Kairo would take care of his marine, carrying him to the roof of the refinery where the Thunderhawk that delivered them would return the injured Dark Angel to the ship above for care by medics and technicians. At that point he would check in with the other teams.
The secondary objective was securing the Imperial Guard bastion, not because it was important for resupply or even for positioning, but instead to deny the Ork pirates any sort of plunder that could make them a more effective fighting force.
"I copy you, Captain. We have secured the Imperial Guard facility with minimal losses. We have one critically wounded, and are evacuating him now. Three others injured who do not require immediate medical attention."