yes they need to go on just neg or positive, if you coil that wire say 10x then it gives you a 10x higer value, but even more accuracy..

Or you can buy a solution that does it for you..

https://www.amazon.com/Line-Splitter-Klein-Tools-69409/dp/B01B7RTNSO/ref=asc_df_B01B7RTNSO/?tag=hyprod-20&linkCode=df0&hvadid=167135564802&hvpos=&hvnetw=g&hvrand=825911591216338534&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9010289&hvtargid=pla-306887699938&psc=1

https://www.amazon.com/UT210D-Digital-Current-Resistance-Capacitance/dp/B0753FY711/ref=asc_df_B0753FY711/?tag=hyprod-20&linkCode=df0&hvadid=254239495834&hvpos=&hvnetw=g&hvrand=7365879628191486550&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9010289&hvtargid=pla-450742515090&psc=1