With regrets, I can't answer your question since I had mine professionally installed by luthier
Kent Schoonover
That said, from everything that I've read over the years, unless you really know what you are doing, have extensive experience with resonator guitars, etc, this is not a DIY installation.
One of the most common issues that DIY's have experienced is damaging the pickup by jamming it in the spider during the setup. I opted to have Kent replace the spider in my guitar with his
modular spider which is designed to work with the Fishman Nashville Series pickup. It costs an extra $80 but it works perfectly. Beard Guitars offers a similar spider as well.
Hope this helps!