I believe it was originally attached to and terminated on the firewall?
Mine came loose a couple of years ago and fell down so I added a tee to the hose and spliced the transmission vent into the same vent hose and then added a couple more feet to the end of the vent hose and terminated it behind the battery with a tie-wrap...
Never did like the original location anyway!!!

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Supporting Vendor and Moderator of LOST05 Jeep Liberty CRD Limited 
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount98 Dodge Cummins 24 Valve