so quick update.
Everything works well, with a much wider FOV
as i noted the install instructions are not for a 4runner so they are of no use.
the vampire taps are too large to tap the oem mirror turn signal as well.
another thing to note, the driver side mirror has 2 metal pronged tabs that have to be removed from the stock mirror and moved to the suma mirror to mount.
I ditched the provided taps, as they are just a short waiting to happen.
Its easy enough to depin the oem mirror signal connector and tin and push the new wires through the grommet to make a water proof stable connection that looks oem and will never short.
Link below for photos of install.
T4R Suma Mirror Install - Album on Imgur