Any weight that can be shifted from the front of an Audi to the rear helps with weight distribution. Quattro cars are very nose heavy, and prone enough to understeer that it often makes turn-in feel more like wishful thinking and daydreaming.
Part of the answer is a shift of the battery to the rear, and in this making a battery cage and then running new cables back to the front. Using the correct equipment to splice on connections, the correct gauge wire and then heat-shrinking the ends means there is no amp loss across the increased distance.
Don’t skimp here. When the car is hot the last think you want is amp drop and a decreased capacity to start.