Mod Install For Model 7501 PSX

[Creeper]

Alright i've already installed one mod chip awhile back on my own playstation. now when i bought my mod chips i got 2 figured if i messed up id have a spare!
Neway i was successful My Model of PSX is 5501
So since i have an extra chip i figured id install it into my girlfriends sons playstation. His model is 7501
now i went to http://www.mod-chips.com/mod_install/PU22-3wires.jpg
for a diagram of were the pins are etc. looks pretty simple accept if one of u guys could go to that page an look down by pin 6
and tell me what that blue jumper there by it is.
they make no mention on the diagram of what that is! im figuring its like a jumper point. but figured i should ask one of u guys if thats correct or not. i dont wanna screw up his Psx!