charging system relay wiring for Dodge

I recently convert from injectors to carburated on my Daytona 1988TBI/EFI.

The computer was removed and all sensors are been exchangeg for older reliable reading sytem senders, like voltage,fuel,tach and speed gauges. I want to use the curent alternator, a 40/90 amp BOSCH . I allready have ID the terminals use and located the starter connectors as well. I need someone to help me with the RELAY controling the charging/starting system. I know a relay is use but i want to use the best one and not as expensive as the originals. I have a % poin BOISCH RElay , prewired and is ready to install. My problem is "HOW". I have some details on the wiring and the schematic shows the relay, but is of no use since this car was pre owned and the other owner rewired the system. I can tell because while working on it I found 3 different wiring plugs and connectors. So i decided to make it my project car. Is a solid car and I feel safe in it. I have it starting but after starting the relay is suppose to change from battery to alternator. I have a TOYOTA 3 wires alternator. One cable for ground, one for battery and oher for warning light, just in case i get tire trying!.As i mentioned, i am a knowledge freak and want to know everything on auto wiring. Have some tech information, as well as knowledge in electronics. It sounds funny but it seems that i allready know how but I can't remember and i want to do it right. Please e mail me to papun5880pr@aol.com with sugestions and or drawings.Taking out my metter and tools tomorow to read curent flow and relay functions. I bet I can do it, with your help. Thanks