The CS 130 Alternaters have 4 conection spades and the battery charge lug. The Four spades at the plug in are labeled as follows S F L P S is for Constant Power F is for ?????? L is for switched power P is for ?????? The Sub. that donated it's motor and some wiring to the buggy had a Alternator plug that only used two of these spades adn the Bat. lug of course. Problem is the STOCK plug that came on the sub for the Alt. is hooking up to the F spade and the L spade. When running the F spade shows Alt. charge voltage. The L spade is the one that I have my Switched power connected to. This seems to work out Ok. My question is What is the F Spade for, also what is the P spade for ???? And second Do I have to show this Alt. Constant Power on the S terminal? I have Searched as long as my patience lasted. Thanks for your.