Diagram reference number 1 in the image below:
" Fitment: 1993 TOYOTA PREVIA DLX - 3 door

Application Notes:

Category: Electrical, Lighting and Body

SubCategory: Cruise Control System

Position: General

Part Number: 8800228070


This is a Cruise Control Actuator that fits the 1993 TOYOTA PREVIA DLX - 3 door with the 2TZFE engine. The Cruise Control Actuator is designed by TOYOTA to be part of the Electrical, Lighting and Body-Cruise Control System. The Cruise Control Actuator has a position on the vehicle of General. The 1993 TOYOTA PREVIA Cruise Control Actuator is a factory made TOYOTA OEM part and it comes with a 12 month 12,000 mile warranty (parts only). Do not be fooled by an aftermarket TOYOTA PREVIA Cruise Control Actuator! Buy a factory TOYOTA part and receive peace of mind!
This factory part has a part number of 8800228070.