Would you like step-by-step instructions to extract drivers from a macOS High Sierra installer instead?
If version 6.1.7866 or a similar update is available for your model, it will appear in the list for installation. Apple Support Community 3. Manual Download (Advanced)
Apple Support: Manual Boot Camp 5.1 Downloads (Note: Only lists older versions)
If you want, I can:
Users working with this specific legacy version often encounter the following:
