535586-001 = 463990-001. These are the part numbers for the Z400, Z600 and Z800 "Mainstream" heatsink/fan which are rated for up to and including processors with 95W Max TDP. Here is a picture of the 5-hole plug for those, with the 5th hole empty:
The above heatsink has 2 rather than 3 cooling tubes, less surface area, and a smaller 82x82mm fan versus the higher heat capacity Performance heatsink. Below is the wiring spoof that can be done to the fan plug end to mimic what the motherboard will see if an actual Performance fan is attached. There has been a black ground jumper wire soldered onto the side of the pin 1 receptacle and its other end will be put into the empty pin 5 receptacle of the white plug.
I'd hesitate to run this mod for a 130W Max TDP processor with a Mainstream smaller heatsink/fan, however, but thought you'd want to see what the process looks like. Getting the Performance heatsink/fan for the Z400 is advised instead, and they are not costly used off eBay:
Just so you know..... that is a pic of how the wires are set by HP for a "Performance" fan, and the heatsink shown beneath is a true "Performance" version. Adding on the ground jumper wire for the mod of a "Maninstream" heatsink fan is easy with a salvaged fan wire from elsewhere, and a bit of solder. You will already have the 5-hole white plug end from your original fan.
Finally, there are some incorrect ads on the web/in eBay stating that the 658001-001 heatsink/fan is a Performance version for the Z400. This is wrong, and that has a conventional white 4-hole PWM type fan plug end. Don't buy that one for sure, and this has been confirmed by our favorite HP engineer, Dan_WGBU. It is for a completely different type of processor socket, and will waste your time greatly.