looking at the parts list I don't think it has a adjuster on the right side that code Y-6A8 98010 is for the left hand adjuster
That part no. applies to both left and right sides as Item No. 4 in the diagrams.
No 4 is the brake shift adjuster it's one of those combined Brake/Shift units
Also looking at the google images for the EF-50 shifter I can see no images of a adjuster on the 8 speed side looks like I'm a dumbass