Convert yamaha 703 side mount to 704 binnacle control?

I am getting a yamaha 50 2s which comes with a 703 side mount control box. I want to convert this to the 704 series surface mount binnacle, what is all involved in doing this? Do I just switch out the 703 for the 704 B1 or P1 series binnacle and plug it in?

If i remove the 703 side mount box which has the kill switch and key, do I need to purchase the seperate kill switch/key panel standalone kit as well with the 704 binnacle?

 

I got that far, so far...

I am acquiring a new 704 series surface mount binnacle, as well as a yamaha start key/kill switch with face-plate combo. I thought the 704 series binnacle comes with the wiring harness built in like the 703 does and it just plugs into the outboard? Do I need a third item here (new harness) ?

Or are you referring to the harness inside the cowling?

 

Thanks!
I am ordering:

Yamaha 704 control box
Yamaha key start and kill switch double faceplate
Yamaha 16 foot 10 pin main wiring harness

Lets hope it all goes together!

 

What's the difference between the Yamaha 704 b1 and p1 binnacle controls?

 

Oh ok, they are the same price on ebay. Newer one it is...