For extension cables, I recommend Windynation MC4 cables. you might also select two 100W panels wired with each other in parallel to increase the charging speed.
Notice that I've paired the Yeti with 400W of solar https://poppielvsq073752.articlesblogger.com/52570641/how-much-you-need-to-expect-you-ll-pay-for-a-good-best-portable-power-station