are you planning on the e3 linker which i would do if u plan on keeping the e3 in the ps3. if your just gonna downgrade then use the ribbon with the clip for nor chip connection but you have to file down the nor chip connector (and a whole lot more for a first time e3 user).
you need to file the clip so it lays flush with the motherboard and there's resistors on either side of the nor chip.