I just had this very same conversation with the folks at Alpha roofing...
They suggest using -
3M 77 spray adhesive They have done a ton of studies and found this to be the best... spray the roof area to be replaced, reconnected , spray the membrane while BOTH are tacky press together and use roller to adhere the 2 together...
Me-Her-the kids
2020 Ford F350 SD 6.7
2020 Redwood 3991RD Garnet