I have just sold my trusty P13 and moved up to a Prowler Ultra 4.3

The Ultra doesn't have the brass fittings in the transducer scupper.
What is the best way of mounting the transducer in a OK 4.3. Do you need to buy the Lowrance Scupper kit or is there an alternative transducer mount (DIY?)
Sorry if this questioned has already been answered before but I trawled through the forums and couldn't find anything specific about how to mount a DSI transducer. Any pics and info appreciated.
Cheers