Mograph/C4D Question

Hello. I'm brand new to C4d. Let's say I have two cubes, one on the left and one on the right. I want to the one on the left to move left 100 units while the one on the right moves right 100 units, both at the exact same time. I want to do this with one set of keyframes (I don't want to put keyframes on both the right and the left cube). What would be the best way to do this.

This clearly isn't exactly what I'm trying to do, just an example. But I figure an answer to this will help me figure out my overall goal, which would be a lot harder to explain.

My first hunch was using a Fracture Object with a Plain Effector. But I was only able to get both cubes to move in the same direction doing this when I really need them to move opposite directions, or more specifically, outwards (further away from the center).

Any help is appreciated. Thanks.