You can try connecting the receiver to either of those if you are sure they are from the satellite and turn on the antenna to see if it locks. Your biggest concern might be what service you are using (Dish, DirecTV) and what the previous owner used. If they are different you must find a KVH dealer with the correct computer and software to reprogram the antenna.
You will also either have to change your receiver setup if you are DirecTV or accomplish a successful Check Switch if you are Dish.
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