Motor guide Xi5 Sonar Adapter Cable

Is it not possible to connect a Garmin 102SV EchoMap to a Motorguide xi5 trolling motor to use the built in transducer using an adapter cable? The garmin has an 8 pin cable and the xi5 has a 6 pin connection. I just want to use the standard 83/200 sonar. Anyone got this to work?

is THIS it?

I believe that is one of them. I think it requires two cables (010-11979-10 and 010-12122-10) and the one in the pic it naturally backordered. Spend $4k on equipment only to have to wait on a $40 piece of wire. Talk about frustrating as heck. Thanks for your help though!!