autometer fuel guage

[76bonanza]

I am having trouble understanding how to wire my new autometer fuel guage. I understand the power and the ground, then it says run a wire straight to the fuel sender? Is this the brown wire that is pluged into the fuse box? Also how do you test the sender wire? Do I set my multi meter to ohms then touch a ground and touch the other lead to the signal wire? And I should get a reading between 0-90?

Thanks for any help