hi
As you have mentioned its LC-SC patch cords which is required to be used but do remember that you are going with proper single or multimode patch cords.
Since you are using LX here in your 6509 side do confirm the other end side too.
if both the sides supports single mode then you wont be having any issues in getting the connectivity thru with LC-SC single mode patch cords.
Coz some of the CWDM or other equipments may not support LX modules and you need to go for SX modules on the other side which again supports multimode patch cords.
regds
