post #5 shows the simple, albeit crude way to connect and get readings (now)
post #3 adds that if you want higher accuracy, an accurate and stable, voltage reference will be advised.
post #2 offers a way to use the mA (current, not voltage) output. this brings it's own challenges, and benefits.
post #4 shows a higher resolution ADC is available, but brings a bit more work
I would offer that the simple voltage dividers, connect to your on-board ADC and ground the two devices and you will have readings of some sort today.
there is a saying that you can get 90% accurate with 90% of the work.
it will take 900% more work to get the next 90%
and 900% to get the next 90%.....
with the resistors, you can connect them, then test with your multi-meter today.
( you might be able to use 1k ohm resistors in lieu of the 10k )
get your Arduino to output a value in 20 minutes or so. allowing time to heat the soldering iron and self questioning and triple checking..... then connecting device grounds D on the device, gnd on the arduino
first sketch to see results with the resistors. right out of the free examples in the Arduino IDE software.
0 to 100%
revisions to scale your results in software, another 20 minutes to 'figure it out'
0 to xx inch pounds or whatever you want.
get the ADS11115 and also get an external precision voltage reference source (wait a week for parts)
put them behind the resistors
couple of hours for a ham-fisted, un-sure noob... (sorry, no insult intended)
get higher resolution and a bit more stable and repeatable results.
joy will be had at each step of the way !