To clarify some things:
When you order a PCIII from Dynojet there is a grey wire that has a bullet type connector on it. They also supply you with a crimp type connector that you clamp on the TPS wire on your 919. You then put the bullet connector to the crimp connector. I don't like crim connectors so I simply cut off the bullet connector & spliced it into the TPS wire of the bike. All you have to do is put on a bullet connector & get a crimp connector for your bike. It is no different than those assortment of electrical connectors at any auto parts store or Walmart. The other option is to splice directly into your bike like I did. Since a little was left on my bike when I removed it it may need to be lengthened for you to do this route. Again no big deal, intall wire, solder, heat shrink. I can do it for you if you want. All the rest of the wires are terminal type plugs which plug directly in line with OEM.
I removed it because I am focusing on my WR250X. I removed the PCIII & my Pazzo levers. I want to rebuild the WR shock & get a quick turn throttle for it.
The PCIII did require me to crack the throttle open to start the bike on occation. That is the only negative--might be the map I was running also. If you search here several others experience this with a PCIII, several do not. It may be the bike, map, PCIII, or right combination of any of those that makes it do it. I have taken the bike on multiple 1,000+ mile trips with nothing but me, the bike, & a bag strapped to my Ventura rack. Never any problems or issues in the 10,000+ miles the PCIII was on my bike other than the cracking of the throttle to start sometimes.