I had the same option as you... Amazon or lonelec.
I bought the one from:
Lonelec
because I knew that it will work. It shipped really quickly compared to where it's located... UK.
It worked without hassle.
Take the fuse panel cover off and flip it over. The illustration on the cover will tell you where the fuse is located.
That's what I used to find it. If you have a battery charger you can hook it to the battery while you tune. I actually take the fuse out and hook the battery charger up just to keep everything at full capacity.