How to make actor point only using two axis?

I have a pendulum that should always point towards an actor along its “x” axis. But, I need that x axis not to rotate, so I presume this would be accomplished only using Z and Y rotations. This pendulums forward vector is its “x” axis, it’s up vector is “z”. I’ve used Make Rot to do this on a different setup, but for some reason I cannot work out the correct paired axis.

Nevermind, of course I just found it. Make Rot X/Z. Actor location goes into X, and up vector of pendulum actor goes into Z.