Scarab Fold down wake tower silver boxes

[Swoldier]

I recently purchased a 2017 Scarab 195 with only 5 hours on it. I have already installed the Cobra Jet kit and currently I am looking at tower speakers. I did notice on the fold down tower there are these small boxes on both sides of the tower with a rubber plug in the center of both. If you pull the plug out you can see wires running down the tower and you can see them coming out at the bottom. The boat did not come with any manual or anything. Is this the location for tower speakers? Is the boat prewired for speakers? Does anyone know where I can get an electrical diagram of the boat or guide me in the right direction of installing speakers and an amp.
Thank you

 

[Hunter]

My scarab 215 HOI has tower speakers pre installed. The wires running up the tower could possibly be for the light on the top of the tower

 

[Swoldier]

the boxes are on both sides and each box has a plug that has wires running down both sides of the tower.

 

[Scarabtech]

Those are speaker and light wires. If you look up the side gunnel after removing the port rear seat cushion(the one where the battery switch is )you will see the plugs for the tower speakers.