Going to Havasu next week need help...

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I store my boat up in Havasu and havn't seen her since October so I am going up there to break her in again but this year I am bringing a lot of audio equipment and a light bar with me and am going to install it all.

How do I run the lines through the tower is there a trickI already have two speakers up there but they were there when I bought the boat?

When mounting my amps in a Calabria ProV should I be very wearry of location because of the ballast or is under any seat compartment OK?

The last question, how do you guys feel about subs loosening screws is it an issue?

Thanks for any advice I only have one day before everyone gets up there so any short cuts would really help