the bass comes in at: 1:45 

he alternates between these two parts 

G-------------| 
D-----------5-| 
A----5-53-3---| 
E-3-3---------| 

G---------------| 
D------------7--| 
A-----7-75-5----| 
E-5-5-----------| 

sometimes he does it more then once before switching to the next part so you need to listen closely