A basic smoke tester can be useful in these situations. Leave it inside the car with the doors and windows closed for 30 mins or so to fill the car with thick smoke, you should see it leaking out of the holes.
I have this one - its basic but does the job
aliexpress.com/p/tesla-landing/index.html?UTABTest=aliabtest125094_24784&src=google&src=google&albch=shopping&acnt=708-803-3821&slnk=&plac=&mtctp=&albbt=Google_7_shopping&gclsrc=aw.ds&albagn=888888&ds_e_adid=784528327853&ds_e_matchtype=search&ds_e_device=c&ds_e_network=g&ds_e_product_group_id=2463919240694&ds_e_product_id=en1005006642306652&ds_e_product_merchant_id=106959561&ds_e_product_country=GB&ds_e_product_language=en&ds_e_product_channel=online&ds_e_product_store_id=&ds_url_v=2&albcp=23272714697&albag=191864323674&isSmbAutoCall=false&needSmbHouyi=false&gad_source=1&gad_campaignid=23272714697&gbraid=0AAAAAD6I-hHL-qdK3MTpI0Ema2awFtvJN&gclid=CjwKCAjwspPOBhB9EiwATFbi5PCAR3LaZGphD23BdD1CPkhjJilbrB9rcTukI15yr1pC9FbnhiKokBoCeDkQAvD_BwE&aff_fcid=a41b7480c3234acabb05997aa673a8c1-1774543819938-06152-irey5Th&aff_fsk=irey5Th&aff_platform=promotion&sk=irey5Th&aff_trace_key=a41b7480c3234acabb05997aa673a8c1-1774543819938-06152-irey5Th&terminal_id=24f51958e50f4dda8253ef308c411e91&scenario=c_ppc_item_bridge&productId=1005006642306652&_immersiveMode=true&withMainCard=true&OLP=1116833308_f_group1&o_s_id=1116833308&afSmartRedirect=n
Also useful for testing out exhaust and intake/PCV/etc leaks