you are welcome, The Diagram is old technology but never the less still useful on forums
You will need to take specific photos of the water ingress point in front/Outside of the window and at the back/Inside and post up the photos.
If you have finished the wall then I will need to recommend alternate solutions.
OT The Static Image is a jpeg which has limited use in conveying what you see behind the wall, for that you will require a gif (rotating animation) or a viewer/app ie mobile phone/ipad etc
If you require more sophisticated 3D tools for viewing (ie Rotating, Zooming,etc) the correct construction/engineered/code compliant details before actually doing the job
Your important "DIY repair" or "how to" post is likely to get lost in amongst vegitation hopefully @Jason will be fixing that in the site upgrade.
Just checking in to see how this project is going. Please let us know if you need further help.