Setting for I2S on Matrix X SPDIF 3 and Direct Stream dac MK1

Hi I just got a DS DAC MK1 from a relative, and want to use 12s but my LUMIN U2 Mini doesn’t have !2s, so have seen the Matrix DDC but bit stumped on what setting on the dip switched on the bottom do I need to choose to make it work with the I2s on the DS? Bit stumped on this one……any help please would be greatly appreciated