you probably won't get much help here.  The only recommended cartridges are new Dell cartridges.  If you want to refill them you are on your own.

Ok  I double checked by sticking toothpicks in the 3 holes. The two middle holes were blue. The  hole that is above them and close to the edge is red. Near that  red hole there is another circle that was not open so I drilled it  and stuck a toothpick in it . It was red also.    So  if the red is at the top and the blue is across the middle perhaps the yellow is in the lower third of the cartridge (under the Dell name)   But there are no holes there so I don't know where to go from here.  thanks for any help.