on a 90 there are jacking points in the front dumb irons and rear crossmember, they are holes about 2" diameter to receive an adaptor that fits to the foot of the high lift.
i have seen people lifting off the fairleads / rim of wheels both alloy and steel to slew the vehicle out of holes or ruts but it will bugger the fairlead or wheels eventually, always better to use the correct lifting points, a few moments longer to set up against a possible long time dead.
you can also jack off the side if you have suitable rock sliders with receiver holes for the adaptor or rails for the foot of the high lift, however jacking from the side is hazardous to the bodywork, i have seen a couple of incidents where the top of the high lift rack badly dented the body and shattered side windows.
the high lift is a fantastic tool i have used mine to winch, lift , spread frame rails to remove crossmembers, pull axles and tie bars into line, clamp my work bench to weld split joints and open a party keg.
however i have also very narrowly missed losing my teeth-life when i hit the release lever while the handle was not fully up, the handle banged up and down until the handle flew out of the socket and stuck into a bog 30 meters away, it took me an hour to find it as there was only 12" sticking out of the bog but a hell of a lot longer to shake the feeling the reaper was on his way.
lesson learnt.!! - leave pin in handle and ensure handle is locked up.