ui_fearmaite, Here is a manual for a Magnum XL 1.20 four stroke. It also has a nipple on the intake manifod. It has the information you are looking for: http://media.hobbypeople.net/manual/210975.pdf

Look at the pictures in the lower left corners of page 1, and 2, of the document. You will see the "Crankcase breather return tube" hooked up to the intake manifold nipple.