This is the one with the obsolete pins that are impossible to find. Molex KK series 4366.
Molex 08-03-0304 (singles) or 08-03-0303 (on strips), Qty 66 for these two connector housings.
1. You can get a kit from Docent Electronics (Order # CAGS5-A1J4-K) that contains all of these wires with pins already crimped on the ends and you simply replace them one by one reusing your plastic housings. Based on the wire colors, it looks like yours was already done using a Docent kit. Maybe do it again just replacing the broken ones and keeping the rest for spares.
2. There are knockoff Molex pins you can get from just one guy on eBay (equipment99.com). A little less expensive than Docent, but a little more work to crimp them on yourself.
ebay.com link: itm
3. NOS (new old stock) of the obsolete Molex pins from eBay and other vendors. Twice the cost of option 1 and 2 above.
If you crimp, you'll need a crimper tool that does the double crimp. In any case, you'll need a tiny flat-blade screwdriver, safety pin, or a suitable pin removal tool; whichever works.
I bought this one and it takes a little practice to figure out the size since the numbers on the tool are marked in square mm. If you can convert mm squared to your wire gauge, then you're golden.
amazon.com link »