I used these on my Apex: https://smile.amazon.com/Anwenk-Furniture-Threaded-Connector-Assortment/dp/B07HR63VF5/

The rampa ones look good (a little pricey). Definitely stay away from the brass ones with the slotted tabs. They break like crazy and then you have to extract the insert.

Wood insert, or threaded insert.

40Pcs Anwenk 1/4"-20 x 15mm Furniture Screw in Nut Threaded Wood Inserts Bolt Fastener Connector Hex Socket Drive for Wood Furniture Assortment (with Hex Spanner) https://www.amazon.com/dp/B07HR63VF5/ref=cm_sw_r_cp_apan_glt_fabc_T5ATA9SAV2DWDN66XTPJ