Question about ebrakes

[jink0619]

Was wondering if someone could shed some insight on ebrakes.
I was in the process of installing the ebrake cable on my m3 after taking out
the rear rotors I've realized there's no ebrake hardware in there. No adjuster, spring, shoe. So my question is, does anyone know what's compatible from between the e30s that will work on the m3?

[jalopi]

I guess look up the part numbers and see if they match between the two models?

[jink0619]

I'm hoping their the same cause would be a pain to get m3 stuff.