Later Jeeps they moved all this evap emissions stuff behind the tail light. Early generations had it on the fender under the hood on the left side. If you want to really trip out, 1996 & 1997 manufactured TJ's used manifold vacuum and it was a round canister with less pipes and brackets. 1998+ that had this style pictured from the O.P. had the cruise control servo also mounted to the canister bracket on the drivers inner fender under hood.
Gotta know all this when you're in the SMOG business.....
RR