... Good catch, I'll have to change that soon. I just looked at my Pico, and the connector I was basing it off of was the one attached to the P4 ATX connector. Those links are correct for the P4 ATX side, but the peripherals side is different. I'll get some links up for the correct connector housing. As far as experience, I just ordered the connectors and should receive them in a week tops (again, thanks for pointing that out, otherwise I would be sitting here wondering why the square peg won't fit in the round hole...) Another thing is I don't have a Mini yet, I've sent Josh an email to see if he has any left unclaimed from this current batch/run (hoping for a blue one), so it'll be a while until I can wire it up for the correct lengths of wire, but I will report back when the connectors come in and let everyone know if they fit or not.
Edit: Links updated/found, I'll post them here as well for convenience.
PicoPSU Header Connectors:
P4 ATX Header: Housing & Pins
Peripheral Header(s): Housing & Pins
*Note these connectors work for the Mini-Box picoPSU-160-XT, other models I'm unsure of... would be kinda stupid to use completely different connectors on other models though if it's the same brand...
**The peripheral housing link also has a schematic of a 5 pin housing, don't be confused, it's just a generic schematic pic for that series of connector. If you look at the "Product Attributes", it is correctly listed as a 4 pin (listed as 4 "position" 1 "row").
***These pins are very small, so for a proper crimp, you'll probably want a crimp tool for these smaller pins (or use the one you've already got or even a pair of small needle-nose pliers might work). Digi-Key sells the official tool for this, but I doubt most of us are willing to pay 500 USD for one tool, so use this LINK to find some alternatives if you wish; or just Google "JST crimp tool" for more/other options.
I ordered a bunch of the pins and headers. I have a normal crimper which I suspect may do the job since I have 3 different sizes on my die, but we'll see. I'll report back once I get everything and try it