The manufacturer is selected from the drop-down list.
If he is there.
If this manufacturer is not in the drop-down list, then you need to ask the administrator to add it.
Preferably with a logo (of the correct size) and a link to the manufacturer's website.
But the administrator, for the last 2-3 years, has not been very actively involved in this site, in addition to maintaining it in working order.
Therefore, the question of adding a little-known manufacturer of 4 figures is somewhat obvious.