That sound good actually. I'm probably gonna have to find a PDF or something else so I know which wire is which (been trying, can't find one). I lack the necessary test tools to figure it out. Are these protected from incorrect wiring? I doubt I'll get this right the first try.
I've attached the PDFs related to this product, the installation manual and the pattern list.
As long as you don't make a mistake with polarity, it is impossible to cause damage no matter how you connect the wires.
Red: positive
Black: Negative
Orange: Pattern selector
Yellow, green, blue: Pattern wires
For a permanent mount unit, there are 7 possible presets based on combinations of the 3 preset wires, powered individually or together.
With a cig plug, you get one preset. They used a flat cable with 3 wires from the beacon. The plug you're looking at on Amazon will work exactly the same as the OEM one, you'll just have a lot of extra wires and the cable diameter will make it messier to route through door seals and such, so using the smaller cable for the switch would be the way to go, but it'd be a good idea to leave at least a foot of the original cable.
To change a pattern, you supply power to the pattern wire(s) to activate it, then you momentarily supply power to the pattern selector wire to move through the sequence of patterns. It will remain on that pattern until that orange wire is supplied power while the pattern preset is activated.
On the magnetic mount, they're nothing special.
It's just your typical 3.25" disk magnet mount, held on by single bolt & nut. The bolt goes through the disc, then the nut secures it and provides spacing, and the whole thing spins into the center hole. A larger disk would be fine too, but more spacing would be needed due to the diameter of cable with the permanent mount.
The mounting pad is not used in the magnetic mounts, only in the permanent mounts. You should be able to get the angle you need from a bolt with countersunk head, I think your best bet would be to have a wedge-shaped round spacer between the mount and the nut. It'll ride high, but in that the base of the 360Star is some sort of aluminum or pot metal, the threads probably strip fairly easily.
Then it occurred to me, if I buy a pre-wired plug with a cut cord, I don't have to wire the actual plug itself, which is a PITA depending on how they set up the blades, so I'll just buy
http://goo.gl/dv5maV (shortened URL). These things had an amber running light mode, right? Would that be mode 2?
The amber dome lights are secondary to each of the primary patterns. The selection cycle goes through each pattern without dome lights, then with dome lights.
This is a screaming deal, by the way. I usually sell these starting at $150 in good, used condition.