bios reset

Hi, i want to reset bios on my toshiba laptop, but i cannot find the jumper on mobo. Where it is?

Hello, its my first time posting here. So my laptop keeps shutting down and resets bios (Bios asking for data and time) for no reason. It lasts maybe 3 minutes or less before shutting down. Temps are from 60 to 70C. The interesting part is, it doesn't shut down while reinstalling windows. Btw...