ayup, two wing(spin) halyards, one centerline(jib) halyard.
works great for w/l's not so much for long distance/offshore stuff, as it doesn't lend itself to peels
or other complicated sail change evolutions.
spins always go up on port wing halyard
stbd wing is the topping lift.
that's the setup on my boat, and most of the other 35's around here.
I've thought about poking a hole below the centerline for a dedicated topper.
my guess is that this configuration evolved in the early days of the class for w/l, short course racing when the
1D class was really hot and thriving. saves a bit of weight aloft and for short course racing it keeps things simple.