How can I use a specular map in unity?

Hey, I have a model with textures that I need to apply in Unity. The only three that I really need are the diffuse, normal, and specular maps. The first 2 work just fine, but I cannot figure out a way to apply the specular map no matter what I do. I have attached an image of the textures. 8484977--1128434--upload_2022-10-3_0-13-28.png

8484977--1128434--upload_2022-10-3_0-13-28.png

And how your shader graph looks like?