The XMP1541 cable combo
You should follow these instructions if you already have an XEP1541 cable combo and you want to transform it.
Step 1. Unsolder the wires from pins 5 (DATA) and 6 (RESET) of the DIN plug and resolder them the opposite way.
The original connections of the XEP1541 cable combo are shown in grey. Connections to cut off are shown with red stripes. You can find the description of all parts used on the diagrams at the legend page.
Source: The Joe Forster-STA homepage