Select layer 2. Press o to go to the out point of that layer. Then, hit page down to go one frame foward. Select layer 5. Press [. Boom. Snapped.
Or, probably better, edit in Premiere Pro. It's waaaaaaaaaaaaaaaaaaaay faster than editing in AE. Then, once your clips are edited, use the Import Premiere Pro Sequence command to bring them into AE for adding your effects and motion graphics.
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