Diagram reference number 1 in the image below:
" Fitment: 1994 LEXUS SC400 - 2 door

Application Notes:

Category: Electrical, Lighting and Body

SubCategory: Cruise Control System

Position: General

Part Number: 8800224010


This is a Cruise Control Actuator that fits the 1994 LEXUS SC400 - 2 door with the 1UZFE engine. The Cruise Control Actuator is designed by LEXUS 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 1994 LEXUS SC400 Cruise Control Actuator is a factory made LEXUS OEM part and it comes with a 12 month 12,000 mile warranty (parts only). Do not be fooled by an aftermarket LEXUS SC400 Cruise Control Actuator! Buy a factory LEXUS part and receive peace of mind!
This factory part has a part number of 8800224010.