We do provide technical guides with setup instructions in the boxes of the equipment we send you. These are also available on the website and... right here: technical guide. Don't say we never give you anything...
If you'd feel more comfortable, you can borrow a skilled Technician to assist with setting up and distributing your headphones on the day from £150 for up to 5 hours.
Prices of Techs can vary depending on how far they need to travel to reach you.