Update Terrain Texture at Object Location at runtime

Hello Unity Community! I need some advice on getting the terrain texture to appear where the indent is, I got it to the same size but it keeps spawning in the corner, any help would be greatly appreciated!

Here is my code.. Sorry for the mess. Also if theres an easy fix to making the indent blend more, I would appreciate being pointed in the right direction! Thank you!

 //////////////////// SET COORDINATES & FLOATS ////////////////////////
 
        // get the normalized position of this game object relative to the terrain
        Vector3 tempCoord = (transform.position - terr.gameObject.transform.position);
        Vector3 coord;
        coord.x = tempCoord.x / terr.terrainData.size.x;
        coord.y = tempCoord.y / terr.terrainData.size.y;
        coord.z = tempCoord.z / terr.terrainData.size.z;
 
        // get the position of the terrain heightmap where this game object is
        posXInTerrain = (int) (coord.x * hmWidth);
        posYInTerrain = (int) (coord.z * hmHeight);
 
        // we set an offset so that all the raising terrain is under this game object
        int offset = size / 2;
 
        // get the heights of the terrain under this game object
        float[,] heights = terr.terrainData.GetHeights(posXInTerrain-offset,posYInTerrain-offset,size,size);
         float[,,] map = new float[size, size, 2];
 
 
 //////////////////// UPDATE TEXTURE ////////////////////////
                 // For each point on the alphamap...
                 for (int y = 0; y < size; y++)
                 {
                     for (int x = 0; x < size; x++)
                     {
                         // Get the normalized terrain coordinate that
                         // corresponds to the the point.
                         float normX = x * 1.0f / (size - 1);
                         float normY = y * 1.0f / (size - 1);
 
 
                         // Get the steepness value at the normalized coordinate.
                         var angle = terr.terrainData.GetSteepness(normX, normY);
 
                         // Steepness is given as an angle, 0..90 degrees. Divide
                         // by 90 to get an alpha blending value in the range 0..1.
                         var frac = angle / 90.0;
                         map[x, y, 0] = (float)frac;
                         map[x, y, 1] = (float)(1 - frac);
                     }
                 }
 
 //////////////////// UPDATE HEIGHT ////////////////////////
 
        // we set each sample of the terrain in the size to the desired height
        for (int i=0; i < size; i++)
            for (int j=0; j < size; j++)
                heights[i,j] = desiredHeight;
 
        // go raising the terrain slowly
        desiredHeight += Time.deltaTime;
 
 
 
 //////////////////// SET NEW CONDITIONS ////////////////////////
        terr.terrainData.SetHeights(posXInTerrain-offset,posYInTerrain-offset,heights);
        terr.terrainData.SetAlphamaps(0, 0, map);
 
         terr.Flush();