google HDS 5 for images of the unit to determine if G1 or 2. IF a Gen 1, you will need the SS/DS black box and cables LSS transducer, for sure, G2 I "think" you need the same black box and related gear, the LSS 2 ducer is larger than the LSS 1. The Touch series has no buttons along the lower edge of the screen as do the G1/2 HU's, and believe the SS/DS is inside the main HU, no longer need a separate black box and cables from the black box to the HU.
GO BIG ORANGE !
I meant to behave, but there were just way too many other options available at the time.