this part is dangling under the car after I got car unstuck from mud

So my car got stuck in the mud yesterday for like 10 minutes and after I got it out I kept hearing this occasional loud clicking sound and I saw this thing dangling. I'll attach a picture.http://i9.photobucket.com/albums/a53/mirokumonk14/01CARISSUE_zpsjvpoqnxb.jpg

looks like you broke off one of your oxygen sensors

is there a way I can put it back on?

i can't tell if it was a screw in one or the one with the 2 studs and nuts. either way it looks like the sensor end is missing so will need to get a new one and inspect where it mounts and see if it has a threaded bung or 2 studs. if its the studs mounting chances are they got snapped off and will need to have someone weld new ones on or replace the pipe it supposed to go into. if its the threaded bung type will need to make sure threaded part isn't snapped off in the hole

it has two holes so it looks like it would need to be screwed on. It fits perfectly on these two pole things

if its the 2 stud type will need to see if they are still there, should be about 3/4" long and threaded