I have the more basic version (that doesnt include microwave cooking

), and my alarm unit is under the main seat. Right at the very front of the pillion seat.
From memory, it was only a matter of lifting the tank (which means rider seat off too), and pillion seat off to fit it.
I'll be helping to fit one of the advanced versions the week after next, unless SoulKiss fits it before the AR.
Either relay you've picked out will do fine. One tip though, the thick orange wire coming from the fuse box is the main ignition live feed (12v+). Don't cut this, because even with just a relay in the line, you loose the LCD panel on your dash.
Look where this wire comes out the fuse box, the holes next to it are fused on the same fuse (and so are live when the ignition is on), solder a wire in here & use that for ingition sensing so you don't loose anything on the dash panel.
Also, think carefully about the remote start option. Do you really want it?