How to add custom filter in Prestashop 1.7.3.0?

Question

CMS

There is a store for prestashop version 1.7.3.0, everything works fine, but for convenience, I would like to add my own filters, such as Manufacturer, Motherboard, RAM, Processor, etc. in general filters for computers and laptops. Created attributes, created product characteristics,

assigned product attributes in the "Combination" mode for products.

I went to "Multi-level navigation", created a new template, chose the categories of goods to which this template belongs, selected filters (the attributes described above), saved everything,

re-indexed attributes, prices, etc. But the filters do not appear, that is, the main prestashop filters appear (price, category, brand) and mine are NOT!

I think it is necessary to configure the .tpl files, but I don’t know where this filter output file is located. If possible, please discard the default filter file, or help edit the current one, but first write where it is located. Please help me guys, thanks in advance!