Make sure you have no voltage/current on the circuit under test.
When your ohm meter leads are not touching, you have an open, high resistance.
When you touch the ohm meter leads together, you have a 'short', zero ohms.
The circuit you are checking for continuity will act the same as the 'short' condition.
You may get an ohm or two if the wire length is long, but it should be close to zero ohms.
That shows that you have continuity. If you have other resistances in your circuit under
test for continuity, the ohm meter will read that resistance in your continuity check.