What do I need to install a Sandisk SSD Plus to my Dell inspiron 3650?

Can someone advise what I need to install my SSD to my Dell inspiron 3650? Had a look inside it seems I'll need a SATA data cable and a SATAP1 power source cable. Went to a computer shop and they don't sell the SATAP1 cable (in fact, never seen one before). Found a forum online saying the product code I'll need is RHYYJ but can't seem to find that on the Dell website.