"attached properly" is correct and commonly used in written English.
It can be used when referring to physical objects or digital files that need to be secured or linked together, such as a document attached to an email or a key attached to a keyring. Example: "Please make sure that the report is attached properly to the email before sending it out."
Mercedes sent Nico Rosberg out without his right rear attached properly.
This sound department employee makes sure that all the cables are attached properly to the microphones and that they're working properly.
Michael Wolf, who runs the Greco Brush Company, a supplier to professional house painters, told me that his customers need to know before each job that every single bristle on every single brush will be attached properly.
Many families use a "co-sleeper" that attaches to the bed; while they can be a nice way to bed-share without bed-sharing, they can be risky if not attached properly and if babies are left unattended in them.
Max Verstappen has lost his engine cover, doesn't look like it was attached properly and the air has got underneath it and lifted the whole section off.
When the volume of porogen decreases than 10 mL, the polymer pores shrined and the analyte was unable to get attached properly.
There was a slight malfunction of the wings — they weren't attaching properly to the Angel's back — so an alternate pair was brought in.
It warrants that all chromosomes congress to the metaphase plate before separating into the two newly forming daughter cells, and that the chromosome kinetochores attach properly to the spindle microtubules.
When chromosomes attach properly to a mitotic spindle, their kinetochores generate force in opposite directions, creating tension.
This first step allowed the hESC colonies to attach properly, and as expected cells continued to express high levels of Oct4 but not Brachyury or Sox17 (data not shown).
Having identified rampant spindle-pole amplification upon Red-Br-nos treatment, we wondered if MTs emanating from poles were able to attach properly to kinetochores.
