Unsolved How to make part of the windshield more opaque and black ?

I'm trying to make a winshield banner that's semi transparent but even when putting that part of the mindshield at max opacity, if it's black it'll look like this

Code:

{
"scintilla_glass_dirt": {
    "name": "scintilla_glass_dirt",
    "mapTo": "scintilla_glass_dirt",
    "class": "material",
    "persistentId": "13c3e5a2-a544-4c38-aa30-a3d756329270",
    "Stages": [
      {
        "ambientOcclusionMap": "/vehicles/scintilla/scintilla_glass_b.color.png",
        "opacityMap": "/vehicles/scintilla/bodywork/scintilla_glass_dirt_b.color.png",
        "metallicFactor": 1,
        "metallicMap": "/vehicles/scintilla/scintilla_glass_m.data.png",
        "normalMap": "/vehicles/scintilla/scintilla_glass_nm.normal.png",
        "opacityMap": "/vehicles/scintilla/bodywork/scintilla_glass_dirt_op.data.png",
        "roughnessMap": "/vehicles/scintilla/scintilla_glass_r.data.png"
      },
      {},
      {},
      {}
    ],
    "dynamicCubemap": true,
    "translucent": true,
    "translucentBlendOp": "PreMulAlpha",
    "version": 1.5
  },
}

Opacity map:


Color map: