The AMD Vitis Linker (v++ -l) is used to link multiple kernel objects (XO), together with the hardware platform XSA file, to produce the device binary XCLBIN file.
Review the conn.cfg file. It creates an instance of each PL kernel described previously and provides the connection scheme between them and the AI Engine graph. At the end of the file, there are Vivado™ tool options specified to close timing and run the design at 300 MHz.