official schematic different from amp?

[christobean]

when i was researching info on my fender frontman amp, i found the official schematic put out by fender.  it shows a line out jack on the front,and a line ou is one thing i wish the amp had

but mine lacks that jack, and where it shows that, there are 2 aux in jacks(one red one white).  any ideas how i would go about putting in a line out jack? is it already set up for one since it shows it in the schematic? or are there different versions of the same model of amplifiers? this whole thing is a mystery to me, any info would be appreciated
thanks