bpm sync the with the same track


I use DJ frequently to loop a song, so it will run a bit longer. I do this for slideshows of weddings, usually with the song the couple opens the dance.

So I put the same song on both turntables, start record and start the left turntable. When the left song is at a point where I want to start the loop I would like to sync the right turntable (which is somewhere earlier in the song) to make the loop.

When I want to use the sync option however, the right turntable will move to the same position as the left. But I only want to match the beat for an easy transfer.

Is there a possibility to disable the syncing of the position in the song?