The second guitar, I guess you could call it the rhythm guitar, starts in the left speaker at 50 seconds.
The bass is slowly fading in from about :38 but he's all in at :50 when the 2nd guitar comes in.
There's at least 4 or 5 distinct guitar parts in the song, the third starts at 1:34
The huge "AC/DC" sound like the sound at 2:28 and more importantly 2:43 you hear is when the 1st, 2nd, sometimes 3rd, 4th etc. guitar parts all play the same stuff together to make it sound super huge.
That sound is lots of times called "Doubling" where the two guitars on the 'outside' (one in each speaker) play together to give a super wide sounding guitar sound.
The sound at 3:13 (not the solo, the other sound) is probably the most clear example of "doubling." Fun!
