The "J clips" are made for small wire. You meter leads have very thick insolation.
You can get banana jacks and use small wire to connect to the clips. (small insulation; do not use on high voltage) Use flexible wire or the wire will brake.
the "J" hooks are good, they also make expanding clips (like one of those grabbers you use to pick up screws and stuff that has a plunger on one end and two or 3 hooked wires at the other end) that work pretty good. there are places the expanding clip can connect that would be awkward with a "J" clip