I designed this for my SVX. It fits on the passenger side footwell. I use the steel piece behind the plastic cover right above the carpet(if you do it right it should fit flush and allow the plastic cover to sit over the screws) to attach this to and run a wood screw into the carpet as it shouldn't damage the carpet if you planned to undo this later. (theres a tab on the bottom to screw through for the carpet part)

Definitely Test fit this first before doing any final drilling.

I will try to find the link for the insert I used. it was a stainless steel cupholder for a boat that has a light at the bottom, I tapped into the old wiring for the console light to turn that

I also covered the print with suede to match the dash, I used a staple gun to keep it held in place, it works decent so long as you don't remove em and redo it too many times.

It appears the one I bought isn't linked to the ebay listing
here's a similar one.
https://www.ebay.com/itm/GREEN-GLOWING-LED-CUP-HOLDER-W-STAINLESS-RIM-3-5-8-HOLE-REQUIRED-BOAT-CUP/252654944263?hash=item3ad3688007:g:m4cAAOSw5cNYOfhA

See Overkill_Engineering on instagram to view photos of it installed on one of these.