I don't know if this helps but i thought it was hydrolically controlled through a valve, i've found no other boxes or compuers besides all the abs crap i'm tossing out, and the the greedy speed cut defender (thats what that wire must be for ) i haven't started mine yet though i'll tell you soon what i find when i get back to work on it...
I'm assuming the jza70 is basically the same as my jzx81 besides the obvious