Open completion window, preselecting completion under cursor?

[josh-nz]

I have the following in my mapping config:

["<C-Space>"] = cmp.mapping(cmp.mapping.complete({}), { "i", "c" })

Is there anyway to have the completion auto select a match if one matches the text under the cursor when manually invoking completion with C-Space?

So, for example, if the cursor is under the word complete in the example above, it would highlight the first completion, highlighted here:

I tried

["<C-Space>"] = cmp.mapping(cmp.mapping.complete({ preselect = cmp.PreselectMode.Item}), { "i", "c" })

but that didn't seem to do anything.

I have noselect as part of my completion options and would like it to remain this way. I only want it to preselect when I manually trigger completion.