Help with My Triple Rec & OD!

[xPAULx]

Hey!
I have :
triple rectifier 3 channel
orange 4x12
Boss tu2
Maxon OD9
Boss ns2
(Line 6 DL4 in loop)

Im trying to set it up so just channel 3 has the OD9 running through it as its the only channel i want to overdrive.....Any ideas?
Im a pretty new Mesa owner so i need some help!

Btw i think it has channel inserts ect on the back of the head?

Thanks!!!!

 

[Holy Diver]

You need a loop-switcher as i have been recently informed......