what should be plugged here??

So i got the jeep running good and got a lil cocky hitting some mud for the first time..now it's throwing codes for an o2 sensor bank one electrical connection or whatever and a trans range sensor...well i changed the nss before all the drama and there is a lil play in the shifter...linkage im sure...but the o2 threw me for a loop then i read about the relays and fuse...fuse is fine...well going to the pdb i noticed an unplugged wire but nothing close