Yamaha DTXpress/DTXplorer/DTXtreme

Hello group,
I just got my hands on a very good condition Peavey KB 100 amp.  It 
seems to be allrite but I havent tested it yet since it is late in 
the night.  The only thing that i noticed is that the "PRE EQ patch" 
input is missing.  From the looks of it, it probably fell inside the 
box.  There is a similar picture of it here at the following link:

http://i12.ebayimg.com/03/i/00/b7/49/41_1.JPG

Mine is identical, its just that the center PRE EQ PATCH 
input/output is missing.  Is it a big deal?  Will i need this 
input?  Can it be easily reparable?

Regards,
Mike