Lenovo laptop how to open where is the Bios Battery?

Hello where is my lenovo G70 The bios Battery? I would like to build it out I have forgotten my bios password, and no longer come in.

Can anyone show pictures which screws I have to open my Lappi Please would be really grateful. Please dear forum help me.

Thank you that helps me the link do it together with the video. You are the best

I like to help…