Hello
basically you have 2 independent topics for cabling depending on you need:
1. follow this one
http://manual.spirit-system.com/index.p ... _Telemetry and connect via Telem UNI cable. this will give you full telemetry available for your Esc, including RPMs. but the rpm signal via telemetry is generally not 'fast' enough for good governor performance, so if you need it, go 2.
2. the 2nd cable on your Esc (the one with the yellow wire, pls check with manual again i am not 100% sure) is a combined cable for 2nd bec connection (red+brown wire, goes into Spirits 2nd bec connector as in manual. i.e. E2, AUX2) and RPM signal (the yellow wire, should go into the middle pin of EXT/RPM/E2)... this is the real time RPM signal from the Esc. this will be the one needed for Spirit GOV. so you have to split the (yellow) cable and put it into a separate servo connector.