The way you would find that , is find a model#/name of motor then Google it. Google should give you websites that would have schematics. The item "Transducer = LOWRANCE LCx-15mt FISHFINDER deapthfinder fishing FISH FINDER" is in sale since Thursday, October 31, 2019.
This item is in the category "eBay Motors\Parts & Accessories\Boat Parts\Electronics & Navigation\Fish Finders & Depth Finders". The seller is "allhsruss" and is located in Spokane, Washington. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Aruba, Belize, Bermuda, Brunei darussalam, Egypt, Gibraltar, Guadeloupe, Iceland, Cayman islands, Sri lanka, Martinique, Maldives, Oman.