Stevestud99,
If you have 2 hydraulic couplers in the rear and 1 handle with a yellow vinyl sleeve over it next to the seat (right hand side), you have a single remote valve. This is the remote used for the backhoe. If you have 4 hydraulic couplers and 2 handles nest to the seat you have a dual (2 remote valves), the extra set is a plus but not used for backhoe. Backhoe hose go 2 couplers located to the left when looking at them from behind the tractor. You may or may not have a detent installed for this remote valve, depends on when it was installed. At first, the single remote (primary) remote came with a detent for backhoe operation, but due to people accidentally engaging the lever without anything connected at the couplers and causing gear pump failures Bobcat took the detent out and offered it as an add on. So to check to see if the remote valve is has a detent, to hold it in on position, start tractor at an idle then push the lever closest to the seat. If it has detent the lever will lock in place and you will hear the engine RPM drop, it the lever springs back to neutral you will need to add the detent about a $20 add on.
The sub-frame will come with the correct brackets that bolt to the tractor.