Yes, you can attach our Go Direct® Acceleration Sensor (GDX-ACC) to the green, metal carts from the Vernier Dynamics System (VDS, discontinued) using the gray, plastic bracket (A) that came with the accelerometer and the small thumbscrews/hex bolts that came with the cart and track.

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The accelerometer is long enough that it rests on the edges of the cart and hex bolts are just barely long enough to reach up to it. There are about 2-3 threads exposed, enough to hold the accelerometer firmly in place.

Note: Attaching it this way orients the accelerometer such that you will want to record data from its y-axis, rather than the default channel (x-axis).