Hope someone will know how to do this, or if it can be done

I have 2 HDS 8's, one on the bow and one at the console, and the LSS-2 structure box with the LSS-2 Transducer at the rear. So, when I see structure on the bow I've already gone by it. If I put an additional LSS Transducer on the trolling motor so I can see whats under me at the bow, do I run it directly to the bow unit, and will I still have DownScan, or does it have to go to the Structure box, then to the unit ? HELP !! LOL