After some suggestions, as not sure the product I need exists.
Adding a case fan to a HP slimline system to cool chipset. The motherboard only has one fan header that runs CPU fan. There are no surplus power leads from PSU, and the two provided are in use and both female SATA.
Thought a product like this would be available, but with SATA male and SATA female instead of Molex.
I have a Molex male to female pass through with 3 pin fan power lead coming off it, but would prefer to minimise the joints instead of adding further adapters each side.