2016 Taurus Battery ground

My battery ground terminal became ate up with corrosion. it traveled down the ground wire and rotted the insulation layer for 4-5 inches, so now i am having starting/charging issues. I cleaned up the terminals but the problem is not solved. I need to replace the 2 wires from the battery lead.

Does anyone have a diagram where these 2 main ground wire go? They disappear into a loom. I would like to replace/upgrade them.

Thanks!