I need to insert an ink cartridge in a brother DCP printer and don't know how to do it and where to put it.?

on my brother dcp-135 c


on the front right hand side of printer is a brother sticker with innobella inks on the front eg lc-970bk/y/c/m , pull the front away , if yours is similar the ink cartridges are in here


inside is your black / yellow / cyan / magenta


pick the colour you want to change (they are coloured to suit)


pull the blue clip down and replace new ink


press the clip back to the original position and close the front panel


job done


hope i explained this ok