You use a graphics card holder, like https://www.newegg.com/jonsbo-model-vc3/p/1DW-0090-00006?Item=9SIAY3SG9N1512&Description=GPU%20holder&cm_re=GPU_holder-_-9S

You use a graphics card holder, like https://www.newegg.com/jonsbo-model-vc3/p/1DW-0090-00006?Item=9SIAY3SG9N1512&Description=GPU%20holder&cm_re=GPU_holder-_-9SIAY3SG9N1512-_-Product&cm_sp=SP-_-979079-_-0-_-2-_-9SIAY3SG9N1512-_-GPU%20holder-_-gpu|holder-_-1 https://www.newegg.com/jonsbo-model-vc3/p/1DW-0090-00006?Ite... (No affiliation, I just clicked on the first search result)