There was no thermostat on the wall so I have nothing to look at to wire to on this one.

I have the RTH2410 with Y R G W on the back of it.

I have a sf-30 Suburban LP Furnace "only" no a/c cooling needed on this install.
Out of the SF-30 I have yellow = 12v (-) DC
red = 12v (+) DC
blue = to go to thermostat
blue = to go to thermostat

Where do I wire up this " Honeywell RTH214 to work with my sf-30 Furnace ?

see figure 6 on page 9 of this link for the wiring for the sf-30

Thanks MARK