double pole switch

[mr.ford garage]

I'm going to wire 240 volt 30 amp double pole switch to a garage heater 240 volt 30 amp as well, need to know how to wire this switch.I have 240 volt 10-2 with ground going to the switch, do I hook these 2 wires to the black terminals and then run the 10-2 wire from the heater to the top lugs on this double pole switch Help me people..I'm using this double pole switch as a disconnect when the heater is not in use

 

[pattenp]

Line to brass screws and heater to black screws.