I have a powerdrive but just use(or going to use)a portable type bracket for my transducer because I take my trolling motor off every night.
Here a permanent way of doing it,didn't know if I wanted to tackel it.
https://www.bassresource.com/bass_fishing_forums/YaBB.pl?num=1204511815/0
Heres another,not so drastic way:
https://www.idofishing.com/forum/showflat.php/Number/122875/93/fpart/all
click on the attachment by buddies name for pictures
The tranducer isn't the hard part,it's the wire running.