This is the black plastic emergency brake cable lock piece that is under the center of the rear of the van and it supports the end of the e-brake cable housing on the end that goes through the frame.
Backing Plate for Front Disc Brakes 2wd Vanagon 86-91 (left)
Front Brake Disc Rotor 86-92 (2wd)
Vanagon Girling Caliper Repair Kit for all 86-92 2.1L Vanagons
Stainless Steel backing plate for front brakes on 2wd Vanagon from 86-91
Guide Pins, Bolts and Boots set for 86-92 Vanagon Girling Caliper
Front Wheel Seal for Syncro Vanagon 86-92