You can just as easily use a paperclip. just bend it into a 'U' shape and insert it into the #4 and #8 slots. Biggest worry would be making sure you have the correct
slots identified... I can't recall the orientation...which row starts with 1 etc. As I recall not all the slots have terminals/wires in them and if you count them out left to right and right to left...top row and bottom row only one set of slots can be the ones you want...because the other way there is no wire/terminal in both slots.
That being said you way want to be a little more "for sure". I believe that there may be an illustration of the OBDII port on this site with the terminals numbered/identified, that might help.