As you did not mention the model of the slide out topper, I cannot give you detailed instructions.
I can give you the link to Colorado's service manuals and you can pick the one you need.
Product Library - Carefree of Colorado
Good luck and be careful I got wrapped by one of the springs. Usually what happens is the spring itself does not brake but because it is pressed on it slips and spins. On one spring I drilled it and put a pin through the end. Yppk care of dat.