Installing Lowrance HDS7 on 2018 RXT 230

[Jastpat]

I'm looking to install my HDS7 fishfinder on a 2018 RXT. Need help with

Best way to connect the power
Best thru-haul fitting for temp cable
Best In-hull transducer
Battery connection process and needs

Starting from scratch, so any info would be appreciated. I plan on using Ram ball mount for FF attachment.

Do I need an in-line circuit breaker and separate fuse box?

Thanks for the help!