Yes, the Roadmaster XL Base Plate Kit part # 1011-3 and the Roadmaster Tracker Tow Bar part # RM-020 are a fit for your 2003 Suzuki XL-7 and will work well together. In order to complete a flat-towing setup you are going to need safety cables, flat-tow wiring, a supplemental braking system, and a possible high-low adapter. I have attached my recommendations on each of these parts for you below.
Safety Cables: Roadmaster Safety Cables part # RM-645
Flat-Tow Wiring: Roadmaster Wiring Kit... view full answer...