Yamee 750s psi recommendations for front/rear shock

[TB693NY]

So I'm trying to find what the recommended psi settings are for the front/rear shock. I contacted Yamee and they basically told me about the dial and lockout on the front and said the rear isn't adjustable. I did notice you can attach a pump and add/reduce psi but I'm not sure what it should be. I believe its based on weight but I'm not sure. Any one know?