Rub her belly in a circular motion when she has a drop on her lips. I use my thumb and roll right over the belly a few times and 90% of the time it gets the kits to start licking and drinking.
Honestly, if she is uninterested in the milk, her chances are even lower. We can't force babies to have a will to survive no matter how much we wish for it. I've lost some babies that were 42g because they were premature and wouldn't eat anything. She may not be nursing, but just clinging to the mom for comfort.