Medcam gradcam++ giving me negative values for the voxels in my desired class

[stevenagl12]

I am having an issue where I am getting negative values for voxels within the classification that I am looking at, and trying to understand what that means? Does that mean that the system thinks those voxels are negatively effecting the classification or does that mean that those voxels are just less significant than the main voxels attributing to the classification of my segmentation?