Nebula was relieved that they all seemed to have made it through the night fairly intact - her own injuries not withstanding. Quill included of course even if she hadn't asked she would have been upset if something had happened to him during the not quite battle.
"Yes, the belt would help." She agreed when he made the offer to help her keep her arm immobile. She wasn't worried about the damage much - she had been torn apart much more thoroughly in the past and had survived that, Thanos had made sure of that. This was small comparatively. "Can you-" She only had the one hand available to her at the moment and she could lift her own arm to put it into the sling getting the belt on and in place would need another hand.
"This is not the way this should have been done." She said shaking her head as she allowed Quill to help her. None of the night had gone the way it should have. Perhaps that was partially on those of them that were sick and insisted on helping - but there had to be a better way - there were no guarantees in a place like this.
She glanced at Gamora's cuts again and nodded, "We should tend to those now. You will help?" She asked Quill - as much as she knew that Gamora could likely do it herself Nebula would have done it for her, but as it was she could only be of so much use - but Quill had fared better than they had and would be the better option.