I don't have pix, but it's the same for all MYs......so pix or any 914 or in person will do, not hard to do....
The one with the map pocket goes on driver side - pocket side up, the other with mirror/cover-flap on passenger side;
install the far side swivels/pins with proper phillips head screws to top corners of windscreen frame, & center fixed holder/pins;
then swing out the outer pins & loosen the small phillips head screws in the clamps in the pin-receiver-holes at the outer top edge of the visors, slide onto the pins & tighten the set-screws enough to hold, but loose enough to slide & swivel on the pins;
then install the inboard end pins into the visors the same way, then you'll need to play around with the length they extend out to allow for removal to swing out to the side window position, then tighten enough to hold but still swivel without the pin sliding back into the visors' holes.
This may take some tries & adjustments to get set-up right, & periodically over time with use.
I did this from memory, so hopefully it's all correct, but improvise if I'm off a bit, cuz I get the "half-zymers" sometimes!
If you don't have them yet, go online to the Porsche website - to the Classics section at documents & download the free pdf 914 PET parts manual file, buy a Haynes repair manual for the 914, & buy a Porsche factory service manual on CD from AA & use on your computer &/or print them out &put into binders for shop reference (or buy a paper version which is costly).
Hope this helps!