On the front if you can't find any obvious points to hook on to: I normally wrap 2 chains around the the front axle housing (not the steering linkage). Some people put a short piece of old fire hose over the chain to keep the front axle from being scratched.
On the rear I go around the axle housing on each side or put a strong clevis in the drawbar and run the chains through it
I use grade 70 transport chain and binders on all 4 chains.