The TPS is at the throttle body on the early 100s. The sensor drives the actuator motor which is the primary manipulator of the throttle plate. If the electronics fail, the last 1/3 or so of pedal travel will mechanically open it to prevent a stranding. Pretty brilliant.
Love seeing those old cable-actuated throttle-by-wire setups. They were genius. All the benefits of TBW when it works and a cable backup should it fail.