MultiTrigger BindingCondition binding to current control

[IeuanWalker]

With a normal trigger im able to bind to a property on the control like this -

But i have a use case where i need to use a multitrigger, which means i need to use BindingCondition instead of Trigger, i have tried the following -

But i get a warning, LocationModel is the DateType for the outer DataTemplate -