Hold on the last frame of an FBX in Sequencer

I’ve imported a RBD sim from Houdini. Very simple test : a cube falls from a height & fractures, then the pieces settle. It’s 99 frames, but I want it to start at frame 70 of my Sequence, which runs to frame 210.
How do I pause on the last frame of the FBX, so that it doesn’t play the animation again, and I don’t have to despawn the actor and put another one in (just for the end frames).
Can I control this in Sequencer via the skeletal mesh or animation sequence, or do I need to put it into a Blueprint then control the Events through the BP?