Where is your brake fluid reservoir on Speedster.

Most likely, your reservoir is a Volvo derivative which just happens to fit right onto the two ends of the VW master cylinder.  To use the Volvo reservoir, you remove the two fluid input fittings on the master cylinder (they are both press fit into the MC housing with o-rings to seal them) and press the Volvo reservoir right onto the holes where the fittings were - it has it's own o-rings to seal the connection.  What you have is one of these:

https://www.cbperformance.com/product-p/6090.htm

And what you want is one of these:

https://www.cbperformance.com/...p/113-611-015bdd.htm

Along with a pair of hoses and one of these:

https://www.cbperformance.com/...t-p/113-611-301l.htm

Theoretically, you could reverse the process and replace those two fittings, if you could find them - I did a quick look and came up with nothing.  If you did that, you would also have to replace the reservoir tank with one for a 1970-ish VW sedan and then you could mount it up in the Frunk and just run a pair of small (1/4"?) hoses to it.

Before I redid my pedals both my M/Cs had integral reservoirs, which made checking/filling my brake fluid a total PITA. When I did the pedals, I stalled this on the bulkhead in front of the beam:

I'm glad I had three separate reservoirs when I high-centered going over a railroad crossing hard enough to cause my brake light sender to leak all the fluid out of my rear circuit.

ps: my car is a Spyder.

The way it was installed in the frunk of my VS is less than perfect because it's not perfectly level. Still works fine but....

Seems to me that the location in the frunk is a very reasonable place to locate it and it seems to have worked fine for more than 3,300 Speedsters built PRIOR to the sale of Vintage SPEEDSTERS and the move to Arizona.  It also seems to be working fine for the cars being built by Vintage Motorcars of California.  The poster, JPC, has a car built by Vintage Speedsters AFTER the company was moved to Arizona.

Thanks for your concerns. Vintage AZ Doesn’t seem to be concerned and they’re going to continue mounting it in a ridiculous spot where nobody can see where they’re oil level is..

Troy, did you forget your pom-poms? Were you the pep captain?

The reservoir location in the trunk was one of the hundreds of changes made for the 1967 model year. They even ran advertising based on all the changes. Of course most notable was the move to 12 volts.