I’m planning to install the Curt. Amazon sells it for a bit cheaper ($55) than it’s shown on the Curt website. ($87) Amazon says it doesn’t fit the R4P - but Curt says it fits the Rav4, so it should be fine in the R4P, you’ll just have extra spare 12V battery wire (I suspect the fit check programs simply haven’t been updated for the Primes yet). https://www.amazon.com/CURT-56434-Vehicle-Side-Trailer-Harness/dp/B07W4LF7HR/ref=sr_1_1?dchild=1&keywords=curt+56434&qid=1625942389&sr=8-1