You can get a paddle wheel sensor, but the Bravo 1 has a pitot tube pickup as well....there's an "insert and twist" connector from the gimbal housing to the drive unit...last thing to connect when you put the drive on, first thing to disconnect when you remove it....
There's a barb connector on the inside of the transom assembly. If you use the paddle wheel then you can cap off the pitot tube. The paddle wheel is more accurate, but I use the GPS anyway so one more thing NOT to mount on the transom.
Be sure to have a good place to mount the trim and tilt motor assembly. And make sure to check that the transom inner and outer faces are parallel....i.e. consistent thickness.
I went through the whole process and migrated from analog gauges to the smartcraft....I'm glad my experiences can be helpful....
So just FYI...
four port CAN bus junction box (hub).....
merc part "878492K 4"
Smartcraft J box terminating resistor part "859318B 1"
Pitot/speed sensor kit part "881879A 2"
Odd that I don't see a paddle wheel sensor in my catalog for the mercruiser...just the opti...but it is a 2005 issue.
I forgot to mention that my Bravo 1 came with analog trim/tilt senders...you may be able to order it with digital tilt-trim senders. After getting the smartcraft I wished I had it. On the other hand the analog gauge works okay. Since I started with analog gauges I already had the analog wiring harness. I had to leave it in place to connect the trim/tilt sensors to....and it's anice backup to have anyway.
I'm not sure what a package ordered with DTS would come with, but be sure to check it all out.