If you buy CONNECTORS, you need these: 50x ATX crimp terminals FEMALE Mini-Fit-Jr for ATX, PCI-E and EPS, made for 18 AWG and 17 AWG (1.00mm²). The difference to the 15-16 AWG FEMALE ATX version can be seen in the second photo. The only difference is the length of the conductor "wings", which wrap around the conductor of the wire when crimped, otherwise both size versions are 100% compatible with all connectors and mating terminals.
FEMALE crimp terminals are always used for CONNECTORS.
These are the best female crimp terminals for ATX, PCI-E and EPS connectors manufactured in the USA by the MOLEX company. You can use these Mini-Fit-Jr crimp terminals on all common wire sizes, which you find e. g. in PC / computer systems on PSU / power-supplies. Crimping of these female ATX crimp terminals on 18AWG (0.8 mm²) and 17AWG (1.00 mm²) electrical wire will be perfect when the electrical wire has the common outer diameter (including insulation) between 1.7 mm to 2.4 mm. MDPC-X recommends electrical wire with PVC insulation for crimping female ATX crimp terminals. You can find electrical wire here at MDPC-X and at some of our MDPC-X Stores around the world or in shops for electrical supplies.
Combine these female ATX crimp terminals with our legendary Crimping Tool for ATX Mini-Fit-Jr crimp terminals by MDPC-X plus the original Pin Remover / Extraction Tool for ATX crimp terminals by the MOLEX company and you will have the full joy of shortening or building your own cables and removing cables. A relatively small investment into absolute freedom in the world of creativity, cable sleeving and technology.