This video might help you. It is a really well video that explains how the shortcut works: https://www.youtube.com/watch?v=nMog9_pWaCs

It is done using Penta in time trials, but it also works with Coco. If you want to see different examples of this shortcut using the female Bandicoot, here you go:

Faster tech for the first wall (it is harder and inconsistent to me than the video beneath this one): https://youtu.be/om1JXWwloZ8?t=49m30s at 49:30

Slide in the first wall (95% consistent :P, but a little bit slower): https://youtu.be/AP-kG87r2zE?t=44m40s at 44:40

I would be glad if it help you :)

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