PCI-6503 on a PCI-e port with an adapter

Hey guys,

We have a PCI-6503 card and we wish to use it with a CPU motherboard which has only PCI-e slots. My IT guy is unable to procure a CPU system which has a PCI port and suggests that we should get a PCI-e to PCI adapter similar to the one below:

https://www.amazon.com/StarTech-com-Express-Adapter-Card-PEX1PCI1/dp/B0024CV3SA?tag=georiot-in-default-21&ascsubtag=tomshardware-1227363769657819765-20

Can someone help me out and let me know if the PCI-6503 card will be able to work using such an adapter.