I like the relay, I'd like to tie into the machine where best/possible and I think I'm going to go with the lower lights for now. To make this thing street legal (for dirt two-tracks even) it needs to have "high beams" these will be my high beams.couple ways to do it.
use a relay to handle the current and a switch to run the relay to keep higher current levels from being right under the dash.
or just use a switch rated for the total current of the lights.
or were you looking for info on the wiring already in the machine and where to tie into?
I would also make your grounds as short and strong as possible.
the lights up top would flood an area better but mounted low would really brighten up a trail...depends on your primary use of the lights