Luxurious German Chocolate Poke Cake

Ingredients:
For the Cake:
1 box of German chocolate cake mix
1 1/3 cups water
1/2 cup vegetable oil
3 large eggs
For the Filling:
1 can (14 ounces) sweetened condensed milk
1 jar (12 ounces) caramel topping
For the Topping:
1 cup chopped pecans
1 cup sweetened shredded coconut
1 can (12 ounces) evaporated milk
1/2 cup granulated sugar
1/2 cup light brown sugar, packed
1/2 cup unsalted butter
3 large egg yolks, lightly beaten
1 teaspoon vanilla extract
1 1/2 cups semi-sweet chocolate chips