Looks like you have to buy an adapter which is the FrankenQuest 2 right? Then that makes it connect up the Vive Strap to the Quest 2. Is this a good source for the adapter? Seems to be just a pla 3d printed adapter.
https://www.amazon.com/dp/B08MWXZYQ7/ref=cm_sw_r_cp_apa_fabc_8yWaGbMZW99K0
I second the DAS, it’s the Deluxe Audio Strap for the HTC Vive then you need to get the adapters to complete the “Frankenquest”. Adapters to connect the DAS to the Quest should be under $20, here’s one on Amazon I haven’t ordered this though so Idk if I could recommend buying from this seller: Frankenquest 2 - for Oculus Quest 2 https://www.amazon.com/dp/B08MWXZYQ7/ref=cm_sw_r_cp_api_glc_fabc_nwH7FbAQ6W8WD
But that’s pretty much what you’re getting, also, search frankenquest 2 into eBay and you could see a few other sellers and their options.
If I felt like spending >$100 I would definitely do this. But, I opted to spend more on games instead so I went cheap with the $38 strap on eBay.
The Adapters that let you put the DAS on the headset. look at these links you'll need to make sure you bought both of these. You need something like this: https://www.amazon.com/Frankenquest-2-Oculus-Quest/dp/B08MWXZYQ7/ref=sr_1_5?dchild=1&keywords=frankenquest+2&qid=1621873498&sr=8-5
and the DAS which is this: https://www.amazon.com/HTC-Vive-Deluxe-Audio-Strap-pc/dp/B06Y2GDXMC/ref=sr_1_3?dchild=1&keywords=deluxe+audio+strap&qid=1621873567&sr=8-3
I use these with deluxe audio strap. Better than elite strap from oculus
​
My upgrades aren't exactly cheap, but this is what I use.
HTC Vive Audio strap $99 and also a Frankenquest 2 so it works with the quest 2
Warning, some people have complained that the back pokes them in the head, but it works fine for me.
I also used a battery as a counterweight, basically find something on Amazon for cheap and then go on Etsy and find the battery holder.
Finally, IMO, the most important for me was lenses. I have big ugly glasses, so I purchased reloptic lenses. The lenses are magnetic, so I just remove the lenses when someone else uses the headset.
https://www.amazon.com/dp/B08MWXZYQ7?ref=ppx_pop_mob_ap_share
These are the ones I went with and worked fine.