How to setup eTax for one OU registered for VAT in different countries with multiple VAT registratio

We have one holding company, setup as the Operating Unit. This is a UK registered company that is VAT registered in several different countries with a different VAT registration number per country (UK, DE, BE, SE, CH, NL). We ship from the holding company (UK) to a customer who is VAT registered in Germany. In this example we charge UK 0 rate VAT, i.e. as per intra-EU VAT rules, and the UK VAT registration number is printed on the invoice. However, if the customer is not VAT registered then we must charge DE VAT and the DE VAT registration number