This is one part of the Vespa ET2 Throttle cable. This is the cable that goes from the junction box under the floorboard to the oil pump. 

The Vespa ET2 throttle cable is a four part unit consisting of a:

cable from the throttle grip to the junction box 581883

a cable from the junction box to the carburetor 582908

a cable from the junction box to the oil pump 562408

the junction box 269571

Photo is not actual product.