How does lspconfig find where lsp servers are after lsp_installer installed them?

[winkee01]

Now I am setting up a minimal lua file for some test, so I removed nvim-lsp-installer temporarily, but since all the lsp servers are installed in ~/.local/nvim/share/lsp_servers, how can I tell lspconfig to find them without the help from nvim-lsp-installer? or why can lspconfig find them after nvim-lsp-installer.setup() is called?

This may be a simple question, but I am really a bit confused, thank you in advance!